Half Life 2 Episode 2 Soundtrack

Half Life 2 Episode 2 Soundtrack

Commercial, Enclosure (Digital) published by Valve on Sep 24, 2014 containing original soundtrack from Half-Life 2: Episode Two with compositions by Kelly Bailey. Listen to music from Half-Life 2 Episode Two OST like vlvx song 28, Sector Sweep & more. Find the latest tracks, albums, and images from Half-Life 2 Episode Two OST.
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Steam album artwork.
The Half-Life 2: Episode Two soundtrack was composed by Kelly Bailey. It was released in part on The Orange Box Original Soundtrack.
Using an appropriate program, it is possible to extract all audio tracks heard in-game from the ep2_pak_dir.vpk archive file. The soundtrack was also included in the game directory of both the full and demo Audiosurf releases on Steam as part of Audiosurf's The Orange Box Soundtrack. On September 24, 2014, the soundtrack was made available as free DLC to all owners of the game on on Steam. On March 16, 2020, Valve partnered with independent record label Ipecac Recordings to release several of the Half-Life series soundtracks on streaming services.[1]

Track listing[edit]* = not present in a given soundtrack.
The Orange Box OST # Game # OST (Steam DLC) # Track title Filename Time Level location Comments
 * 01 04Extinction Event HorizonVLVX_song20.mp3 2:04To the White Forest: The very beginning of the chapter, as Gordon is climbing out of the train wreck. The title is likely indicative of the impending return of multitudinous Combine forces through the Citadel's superportal, which would result in a genocide of humanity, or an extinction event, and how this, for humanity's survival, would be an inescapable 'point of no return,' which in layman's terms is what an event horizon is in regards to spacetime in astrophysics.
 12 02 05Vortal CombatVLVX_song22.mp3 3:14This Vortal Coil: During the final wave of the Antlion attack, in which the vortigaunts assist Gordon Freeman in the fight.
The song can also be heard during part of the Portal teaser trailer. The title is a pun on both Vortigaunts and the Mortal Kombat game series.
 * 03 03NectariumVLVX_song15.mp3 1:47This Vortal Coil: When the Lone Vort finds the larval extract.
 * 04 10Inhuman FrequencyVLVX_song26.mp3 1:50This Vortal Coil: During the G-Man sequence, when the G-Man talks to Gordon as the Vortigaunts attempt to heal Alyx.
 * 05 *Crawl YardVLVX_song9.mp3 1:14Freeman Pontifex: Near one of the radioactive lakes.
 * 06 *Industrial Suspense 1industrial_suspense1.wav 0:12Riding Shotgun: Upon finding the dead rebel before encountering the Barn Advisor. This track also appears in Half-Life 2.
 * 07 07Shu'ulathoiVLVX_song23ambient.mp3 2:38Riding Shotgun: During the scene with the Barn Advisor. This track title is a reference to the Vortigaunt name given to the Combine Advisors.
 10 08 06Sector SweepVLVX_song23.mp3 2:46Riding Shotgun: During the Combine ambush directly after the meeting with the Barn Advisor. In the console versions of The Orange Box, this song is played at the main menu for the Episode Two screen.
 * 09 11Hunting PartyVLVX_song27.mp3 3:29Riding Shotgun: During the Hunter ambush.
 * 10 01No One Rides For FreeVLVX_song0.mp3 1:02Under the Radar: When first driving away from the junkyard after destroying the Autogun.
 * 11 12Eon TrapVLVX_song28.mp3 3:13Under the Radar: During the ambush at the White Forest Inn.
 06 12 09Abandoned In PlaceVLVX_song25.mp3 2:47Our Mutual Fiend: During the Combine invasion of the White Forest Base, during the mission to close the second silo.
 08 13 08Last LegsVLVX_song24.mp3 2:07Our Mutual Fiend: When fighting the second wave of Striders and Hunters during the attack on the missile silo.
 11 14 02Dark IntervalVLVX_song3.mp3 1:35T-Minus One: Starts during the final scene and continues over the credits. Also plays in Half-Life 2: Lost Coast, when first entering the St. Olga monastery. A section of the track reappears in the final scene of Half-Life: Alyx.
External links[edit]Half-Life 2: Episode Two Soundtrack on Steam
Half-Life Music Soundtracks on official Half-Life website
Real world subjects
SoundtracksHalf-Life · Half-Life: Opposing Force · Half-Life: Blue Shift · Half-Life 2 · Half-Life 2: Episode One · Half-Life 2: Episode Two · Half-Life: Alyx ·The Orange Box · Portal · Portal 2
Songs'Exile Vilify' · 'Cara Mia Adio (Turret Opera)' · 'GLaDOS' Song' (cut) · 'Still Alive' · 'Want You Gone' · 'You Wouldn't Know'
CompaniesArkane Studios · Captivation Digital Laboratories · Cloudhead Games · Cryptozoic Entertainment · Electronic Arts · Gearbox Software · Junction Point Studios · Nvidia Corporation · Sierra Entertainment · Sixense Entertainment · Traveller's Tales · Taito Corporation · Valve Corporation · Vivendi Games · Zen Studios
PeopleCharacter models · Production staff · Voice actors
Other mediaComics:Portal 2: Lab Rat · Randolph the Red-Nosed Turret · Turret LullabyDevelopment booksandarticles:The Art of Portal 2 · The Final Hours of Half-Life 2 · The Final Hours of Portal 2 · Half-Life 2: Raising the Bar · The Final Hours of Half-Life: Alyx
Films:Half-Life: Uplink
MascotsBendy · Mr. Valve
OtherApertureScience.com · Canon · Games · Half-Life and Portal universe · Recurring themes · Retcons

The Orange Box OST #	Game #	OST (Steam DLC) #	Track title	Filename	Time	Level location	Comments
*	01	04	Extinction Event Horizon	`VLVX_song20.mp3`	2:04	To the White Forest: The very beginning of the chapter, as Gordon is climbing out of the train wreck.	The title is likely indicative of the impending return of multitudinous Combine forces through the Citadel's superportal, which would result in a genocide of humanity, or an extinction event, and how this, for humanity's survival, would be an inescapable 'point of no return,' which in layman's terms is what an event horizon is in regards to spacetime in astrophysics.
12	02	05	Vortal Combat	`VLVX_song22.mp3`	3:14	This Vortal Coil: During the final wave of the Antlion attack, in which the vortigaunts assist Gordon Freeman in the fight. The song can also be heard during part of the Portal teaser trailer.	The title is a pun on both Vortigaunts and the Mortal Kombat game series.
*	03	03	Nectarium	`VLVX_song15.mp3`	1:47	This Vortal Coil: When the Lone Vort finds the larval extract.
*	04	10	Inhuman Frequency	`VLVX_song26.mp3`	1:50	This Vortal Coil: During the G-Man sequence, when the G-Man talks to Gordon as the Vortigaunts attempt to heal Alyx.
*	05	*	Crawl Yard	`VLVX_song9.mp3`	1:14	Freeman Pontifex: Near one of the radioactive lakes.
*	06	*	Industrial Suspense 1	`industrial_suspense1.wav`	0:12	Riding Shotgun: Upon finding the dead rebel before encountering the Barn Advisor.	This track also appears in Half-Life 2.
*	07	07	Shu'ulathoi	`VLVX_song23ambient.mp3`	2:38	Riding Shotgun: During the scene with the Barn Advisor.	This track title is a reference to the Vortigaunt name given to the Combine Advisors.
10	08	06	Sector Sweep	`VLVX_song23.mp3`	2:46	Riding Shotgun: During the Combine ambush directly after the meeting with the Barn Advisor.	In the console versions of The Orange Box, this song is played at the main menu for the Episode Two screen.
*	09	11	Hunting Party	`VLVX_song27.mp3`	3:29	Riding Shotgun: During the Hunter ambush.
*	10	01	No One Rides For Free	`VLVX_song0.mp3`	1:02	Under the Radar: When first driving away from the junkyard after destroying the Autogun.
*	11	12	Eon Trap	`VLVX_song28.mp3`	3:13	Under the Radar: During the ambush at the White Forest Inn.
06	12	09	Abandoned In Place	`VLVX_song25.mp3`	2:47	Our Mutual Fiend: During the Combine invasion of the White Forest Base, during the mission to close the second silo.
08	13	08	Last Legs	`VLVX_song24.mp3`	2:07	Our Mutual Fiend: When fighting the second wave of Striders and Hunters during the attack on the missile silo.
11	14	02	Dark Interval	`VLVX_song3.mp3`	1:35	T-Minus One: Starts during the final scene and continues over the credits.	Also plays in Half-Life 2: Lost Coast, when first entering the St. Olga monastery. A section of the track reappears in the final scene of Half-Life: Alyx.

Real world subjects
Soundtracks	Half-Life · Half-Life: Opposing Force · Half-Life: Blue Shift · Half-Life 2 · Half-Life 2: Episode One · Half-Life 2: Episode Two · Half-Life: Alyx ·The Orange Box · Portal · Portal 2
Songs	'Exile Vilify' · 'Cara Mia Adio (Turret Opera)' · 'GLaDOS' Song' (cut) · 'Still Alive' · 'Want You Gone' · 'You Wouldn't Know'
Companies	Arkane Studios · Captivation Digital Laboratories · Cloudhead Games · Cryptozoic Entertainment · Electronic Arts · Gearbox Software · Junction Point Studios · Nvidia Corporation · Sierra Entertainment · Sixense Entertainment · Traveller's Tales · Taito Corporation · Valve Corporation · Vivendi Games · Zen Studios
People	Character models · Production staff · Voice actors
Other media	Comics:Portal 2: Lab Rat · Randolph the Red-Nosed Turret · Turret Lullaby Development booksandarticles:The Art of Portal 2 · The Final Hours of Half-Life 2 · The Final Hours of Portal 2 · Half-Life 2: Raising the Bar · The Final Hours of Half-Life: Alyx Films:Half-Life: Uplink
Mascots	Bendy · Mr. Valve
Other	ApertureScience.com · Canon · Games · Half-Life and Portal universe · Recurring themes · Retcons

↑Ipecac Recordings on Twitter (March 16, 2020)
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Power Starz SoundtrackSteam album artwork.
The Half-Life 2 soundtrack was composed by Kelly Bailey. It is an amalgamation of newly-composed music and several cues from Bailey's previous work on Half-Life. Most, if not all, of the tracks were named by Marc Laidlaw.[1]
The limited edition Half-Life 2 'Gold' package included, among other exclusive extras, a CD soundtrack. Although the CD contains several exclusive tracks, it does not include all of the music heard in the game. Using an appropriate program, it is possible to extract all audio tracks heard in-game from the hl2_sound_misc_dir.vpk archive file. The soundtrack (save the CD versions of tracks 1 and 34) was also included in the game directory of both the full and demo Audiosurf releases on Steam as part of Audiosurf's The Orange Box Soundtrack. On September 24, 2014, the soundtrack was made available as free DLC to all owners of the game on Steam. On March 16, 2020, Valve partnered with independent record label Ipecac Recordings to release several of the Half-Life series soundtracks on streaming services.[2]
Track listing[edit]* = not present on the Half-Life 2 Original Soundtrack CD.
** = not present in Half-Life 2 game files.
 OST # Game # Track title Filename Time Level location Comments
 01 **Hazardous Environments (long version)Half-Life13.mp3 1:23Does not appear in the retail game This track is the Valve Software theme music, a short version of which is played during the Valve logo movie in all Valve games. This track originally appeared in Half-Life as Valve Theme (long version).
 * 05Hazardous Environments (short version)HL1_song11.mp3 0:35A Red Letter Day: when Gordon puts on the HEV suit in Dr. Kleiner's lab. An edited version of Hazardous Environments, skipping the first few seconds and concluding before further percussion can begin.
 02 10CP ViolationHL2_song20_submix0.mp3 1:43Route Kanal: Early in the level in a train tunnel that has the player moving through side passages. Specifically when a Civil Protection officer pushes an explosive barrel down some stairs The name 'CP Violation' is a double entendre, referring to both Civil Protection and the eponymous physics term.
 * 13CP Violation (remix)HL2_song20_submix4.mp3 2:20Route Kanal: Upon leaving the pool with a mixer in it, where Civil Protection rolls explosive barrels from a top ledge at the player.
 03 12, 44The Innsbruck ExperimentHL2_song4.mp3 1:06Route Kanal: when first fighting Submachine Gun-wielding Metrocops that rappel down from the top of some drainage system. (first instance)Anticitizen One: When Dog shows off his strength during a fight with the Combine at the beggining of the chapter. (second instance)
 Contains a sample from Zero-G's Cuckooland: Ambience sample library.[3] This track was used in the 2004 Half-Life 2 trailer. On console versions of The Orange Box, it is played when highlighting Half-Life 2 on the menu. See 'Beam Me Up' for more information on the name.This track bears similarities to You're Not a Good Person from the Portal soundtrack, which was also composed by Kelly Bailey.
 04 50Brane ScanHL2_song31.mp3 1:41Anticitizen One: Leading up to the fight in the plaza containing the Combine generator. The title is a play on the procedure 'brain scan' and the string theory term Brane.
 05 27, 65Dark EnergyHL2_song3.mp3 1:33Highway 17: Played when leaving Shorepoint Base.Credits: Played during the first section.
 Contains samples from EastWest's Tekno/Industrial sample library.[3] The very ending of the track contains a snippet of Highway 17.
 06 24Requiem For RavenholmRavenholm_1.mp3 0:33'We Don't Go To Ravenholm...': After passing through the gate at the end of the courtyard and Father Grigori bids farewell, the song plays.
 07 **Pulse Phase (OST mix)HL2_song5.mp3 1:07Does not appear in the retail game This version appears in the original soundtrack CD and in AudioSurf, as well as the 2003 Half-Life 2 leak. This track is simply a portion of Dark Energy, significantly slowed down and lowered in pitch.
 * 55, 64Pulse Phase (game mix)HL2_song6.mp3 0:45'Follow Freeman!': As the player enters the Strider battle just outside the Overwatch Nexus. (first instance)Dark Energy: When the player is descending in the elevator to face Breen. (second instance)
 This version of the track appears in the retail game. It consists of the 'loop' version played four times in a row.
 * **Pulse Phase (loop)HL2_song6.wav 0:11Does not appear in the retail game This version only appears in the leak.
 08 23Ravenholm RepriseHL2_song7.mp3 0:50'We Don't Go To Ravenholm...': Starts playing as soon as the player exits the wooden hallway.
 09 16Probably Not a ProblemHL2_song33.mp3 1:24Route Kanal: During the Headcrabshelling around the toxic water, before getting the airboat. The track's title may be referencing a quote from Half-Life where a scientist mentions a 'small discrepancy' during the experiment at the beginning of the game, prefacing this by saying that it's 'probably not a problem.'
 10 36, 52Calabi-Yau ModelHL2_song30.mp3 1:46Sandtraps: Upon entering the Vortigaunt Camp after killing the Antlion Guardian. (first instance)'Follow Freeman!' Plays near the start of the level when entering the Zombie-infested building. (second instance)
 Contains a sample from Zero-G's Ambient Vol. 1 sample library.[3]
 11 28Slow LightHL2_song32.mp3 0:45Highway 17: Plays after the Gunship in New Little Odessa has been defeated.
 12 07, 37Apprehension and EvasionHL2_song29.mp3 2:18'A Red Letter Day': While escaping from Civil Protection through the train tracks. (first instance)Sandtraps: During the night time raid on Nova Prospekt (the bunker raiding section). (second instance)
 Contains a sampled instrument from Spectrasonics' Distorted Reality sample library.[3]
 13 57Hunter DownHL2_song28.mp3 0:13'Follow Freeman!': Played immediately after the last Strider is killed.
 14 06Our Resurrected TeleportHL2_song26.mp3 1:12'A Red Letter Day': The teleport room in Dr. Kleiner's laboratory
 15 **Miscount DetectedHL2_song25_Teleporter.mp3 0:48Does not appear in the retail game Appears in the game files, AudioSurf, and the original soundtrack CD, but nowhere in the retail game. It was supposed to play during the aborted teleport sequence in 'A Red Letter Day'. Contains a sample from Zero-G's Ambient Vol. 1 sample library.[3]
 16 **HeadhumperHL2_song24_Lamar.mp3 0:08Does not appear in the retail game A bonus track on the original soundtrack CD and in AudioSurf. Was originally supposed to play when the player is ambushed by a Headcrab while exploring a zombie-infested shack during Water Hazard.[1]
 17 26Triage at DawnHL2_song23_SuitSong3.mp3 0:45'We Don't Go To Ravenholm...': At Shorepoint Base, when the battle in the garage is over. The name is a reference to the the very situation the player finds themselves at the point it is played - Triage of Winston at dawn break. It is also known as a popular remix titled That Long Train Ride by DJ Dain, and it was also remixed by Frederick Lloyd for the trailer for The Final Hours of Half-Life: Alyx.[4]
 18 **Combine HarvesterHL2_song22_CombineTheme3.mp3 1:23Does not appear in the retail game A bonus track on the original soundtrack CD and AudioSurf. Was originally supposed to play somewhere in the Citadel.[5] The title is a reference to the combine harvester, a farming machine that harvests grain crops.
 19 30, 43Lab PracticumHL2_song2.mp3 2:52Highway 17: Under the train bridge.Entanglement: After exiting the teporter in Dr. Kleiner's lab, just before the beginning of Anticitizen One.
 A longer version of 'Shadows Fore and Aft' without the extra sound effects.
 20 38Nova ProspektHL2_song19.mp3 1:55Nova Prospekt: When the player initially enters the prison. A subtle refrain from 'CP Violation' can be heard at 1:00 for around twenty seconds before dropping to a more dramatic outro.
 21 15Broken SymmetryHL2_song17.mp3 1:03Route Kanal: Upon leaving the sewers and arriving at the first toxic water area.
 22 56LG OrbifoldHL2_song16.mp3 2:52'Follow Freeman!': When the player and other citizens go underground and fight Combine soldiers during the Uprising on the last map of the chapter. Contains samples from Zero-G's Cuckooland: Asylum sample library.[3]
 23 54KaonHL2_song15.mp3 1:11'Follow Freeman!': When fighting the Combine Gunship over the Overwatch Nexus. The title is a reference to the Kaon, a subatomic particle.
 24 19You're Not Supposed to Be HereHL2_song14.mp3 2:41Water Hazard: After receiving the mounted gun for the Airboat and facing the Hunter Chopper. The title is a reference to a line the G-Man said to the player in a cut training level of Half-Life 2 that can be found in the Half-Life 2 leak. The G-Man uses the line again, this time directed at Alyx, in a trailer for Half-Life 2: Episode Two. Contains samples from EastWest's ProSamples Vol. 03: Drum & Bass 1 sample library.[3]
 25 46Suppression FieldHL2_song13.mp3 0:56Anticitizen One: While meeting your first rebel squad member of the chapter in the playground.
 26 47, 48Hard Fought (long)HL2_song12_long.mp3HL2_song12d.mp3 1:13Anticitizen One: Played twice in a row: first when assaulting a Civil Protection barricade, and then during the underground shootout while waiting for a hole to be blown open by a rebel. This version of the track appears in the retail game. Contains samples from EastWest's ProSamples Vol. 03: Drum & Bass 1 and Zero-G's Cuckooland: Ambience sample libraries.[3] This track also appears in the Half-Life 2: Episode One trailer.
 * **Hard Fought (short)HL2_song12_short.mp3HL2_song12c.mp3 0:44Does not appear in the retail game This version only appears in AudioSurf and the Half-Life 2 leak.
 * **Hard Fought (early version)HL2_song12.mp3 0:44Does not appear in the retail game This version only appears the Half-Life 2 leak. Also known as 31_39_01.AIF.
 27 25Particle GhostHL2_song1.mp3 1:38'We Don't Go To Ravenholm...': Kicks in upon leaving the Ravenholm Mines and heading into the snipers' nests outside, right before the Fast Zombie appears.
 28 01Shadows Fore and AftHL2_intro.mp3 1:25Point Insertion: During the G-Man's speech at the start of the game. This is shorter version of Lab Practicum with added sound effects. The whirring of Manhack blades and Kleiner's teleport can be heard in the background.
 29 58Neutrino TrapHL1_song9.mp3 1:35Our Benefactors: Upon exiting the sewer tunnel at the base of the Citadel. Contains a sample from Zero-G's Electric Dreamz sample library.[3] This track originally appeared in Half-Life as Hurricane Strings.
 30 11Zero Point Energy FieldHL1_song6.mp3 1:42Route Kanal: When first entering the sewers after the Hunter-Chopper first attacks. Contains samples from Zero-G's Electric Dreamz and Trance Formation sample libraries.[3] This track originally appeared in Half-Life as Cavern Ambiance.
 31 49, 59Echoes of a Resonance CascadeHL1_song5.mp3 1:38Anticitizen One: Upon entering the underground hazardous liquid cavern with the cars. (first instance)Our Benefactors: While Freeman is in the prisoner pod, moving through the Citadel. (second instance)
 Contains samples from Zero-G's Dream Zone sample library.[3] This track originally appeared in Half-Life as Space Ocean.
 32 22Black Mesa InboundHL1_song3.mp3 2:14Black Mesa East: The scrapyard where you first receive the Gravity Gun and meet Dog. The name is derived from the first level of Half-Life, in which the player is making their way to the Anomalous Materials Lab. Contains samples from Zero-G's Electric Dreamz and Dream Zone sample libraries.[3] This track originally appeared in Half-Life as Vague Voices.
 33 63Xen RelayHL1_song26.mp3 0:40Dark Energy: Upon reaching the top of the Citadel, just before meeting Dr. Breen. This track originally appeared in Half-Life as Threatening Short.
 34 **Tracking Device (OST mix)HL1_song25.mp3 1:03Does not appear in the retail game Contains a sample from Zero-G's Trance Formation sample library.[3] This track is a remix of 'Credits/Closing Theme' from Half-Life. This version only appears on the soundtrack CD.
 * 66Tracking Device (game mix)HL1_song25_REMIX3.mp3 1:01Credits: Played during the second section. This version only appears in the Half-Life 2 game files and Audiosurf.
 35 42SingularityHL1_song24.mp3 1:19Entanglement: When viewing the Nova Prospektteleport. This track originally appeared in Half-Life as Traveling Through Limbo.
 36 41Dirac ShoreHL1_song21.mp3 1:27Entanglement: When entering the flooded basement. The name 'Dirac Shore' is a play on the physics term Dirac Sea. This track originally appeared in Half-Life as Dimensionless Deepness.
 37 21Escape ArrayHL1_song20.mp3 1:27Black Mesa East: At the start of the level, right after the loading screen. This track originally appeared in Half-Life as Electric Guitar Ambiance.
 38 61Negative PressureHL1_song19.mp3 1:58Our Benefactors: At the beginning of Dr. Breen's speech: 'You have destroyed so much. What is it exactly that you have created?' Contains samples from Zero-G's Trance Formation and Cuckooland: Unhinged sample libraries.[3] This track originally appeared in Half-Life as Steam in the Pipes, and also appears in Half-Life 2: Episode One.
 39 29Tau-9HL1_song17.mp3 2:06Highway 17: When first reaching the crane. This track originally appeared in Half-Life as Drums and Riffs.
 40 33Something Secret Steers UsHL1_song15.mp3 2:03Sandtraps: At Lighthouse Point during the Dropship attack. The title is a reference to a sentence said by the All-Knowing Vortigaunt. Contains samples from EastWest's Symphonic Adventures production music library and Zero-G's Cuckooland: Unhinged sample library.[3] This track originally appeared in Half-Life as Nuclear Mission Jam.
 41 51Triple EntanglementHL1_song14.mp3 1:32Anticitizen One: Upon entering the Zombie infested sewers near the end of the chapter. This track is a remix of Sirens in the Distance from Half-Life.
 42 **Biozeminade FragmentHL1_song13.mp3 0:32Does not appear in the retail game A bonus track on the original soundtrack CD, though it does not appear in the retail game files or AudioSurf. The name is an homage to an early Amazon.com joke review for Half-Life 2 in which a fan claimed the game had Biozeminades in it.[1][6] Contains a sample from Zero-G's Cuckooland: Unhinged sample library.[3] This track is a sped-up version of Alien Shock from Half-Life.
 43 18Lambda CoreHL1_song10.mp3 1:45Water Hazard: When fleeing from the second Hunter-Chopper while driving through large cement pipes. Contains samples from Sounds Good's Methods of Mayhem: Industrial Toolkit sample library.[3] This track originally appeared in Half-Life as Diabolical Adrenaline Guitar.
 * 39EntanglementHL2_song0.mp3 0:39Nova Prospekt: Upon entering the Combine Wall crushing canyon at end of chapter, just before meeting Alyx. This track only appears in the Half-Life 2 game files.
 * 09Entanglement (loop)HL2_ambient_1.wav 0:08Route Kanal: When exiting the first underground section, before climbing on top of the moving train. This track only appears in the Half-Life 2 game files. Was originally only in the leak until the June 2013 SteamPipe update. It is the only track to play as an ambient sound.
 * 32Highway 17HL2_song8.mp3 0:59Sandtraps: At the house by the coast where Combine soldiers are burning bodies. This version of the track appears in the retail game. It consists of the 'loop' version played four times in a row.
 * **Highway 17 (loop)HL2_song8.wav 0:15Does not appear in the retail game This version only appears in the leak.
 * 04A Red Letter DayHL2_song10.mp3 0:29'A Red Letter Day': When entering Dr. Kleiner's lab. This track consists of part of a sample from Zero-G's 'Cuckooland: Ambience' sample library.[3]
 * 31SandtrapsHL2_song11.mp3 0:34Sandtraps: At the zombie-infested area of the tunnels. Also known by the filename 31_56_01.AIF. Was originally supposed to have an earlier appearance in Route Kanal, during the first Barnacle encounter, right before Civil Protection executes a group of rebels. Consists of a slowed-down sample from Zero-G's 'Cuckooland: Ambience' sample library.[3]
 * 02Train Station 1HL2_song26_trainstation1.mp3 1:30Point Insertion: When entering the outdoor plaza with the Breencast. This track consists of a sample from Zero-G's 'Cuckooland: Ambience' sample library.[3]
 * 03, 53Train Station 2HL2_song27_trainstation2.mp3 1:12Point Insertion: When running on the rooftops from Civil Protection. (first instance)'Follow Freeman!': When entering the lobby in the Overwatch Nexus with Barney. (second instance)
 * 45Radioradio1.mp3 0:39Anticitizen One: When entering the room adjacent to the closet with the TV showing the G-Man. This track consists of samples from Zero-G's 'Cuckooland: Ghost in the Machine' sample library.[3]
 * 17, 60Industrial Suspense 1industrial_suspense1.wav 0:12Water Hazard: In the beginning of the chapter, upon seeing a citizen dropping supply crates from a bridge. (first instance)Our Benefactors: Right after Dr. Breen's 'I am nothing if not pragmatic' speech. (second instance)
 This track also appears in Half-Life 2: Episode Two.
 * 62Industrial Suspense 2industrial_suspense2.wav 0:11Our Benefactors: After Dr. Breen's 'laying the foundation for humanity' speech and jumping down, before the Strider battle.
 * 40Apprehensive ShortHL1_stinger_song7.mp3 0:23Entanglement: When Eli's Combine pod opens up at the window with Alyx and the player. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 08Bass String ShortHL1_stinger_song8.mp3 0:09Route Kanal: When Civil Protection is beating up the couple, right before the player gets the pistol. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 34Scared Confusion ShortHL1_stinger_song16.mp3 0:16Sandtraps: Right before the Antlion Guard battle outside the Vortigaunt camp. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 14Dark Piano ShortHL1_stinger_song27.mp3 0:17Route Kanal: When entering the room full of explosive barrels and Manhacks. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 20, 35Sharp Fear ShortHL1_stinger_song28.mp3 0:07Water Hazard: When the Hunter-Chopper is destroyed. (first instance)Sandtraps: When the Antlion guard emerges outside the Vortigaunt camp. (second instance)
 Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life, and also appears in the Half-Life 2: Episode One trailer.
External links[edit]Half Life 2 Episode 2 Soundtrack

OST #	Game #	Track title	Filename	Time	Level location	Comments
01	**	Hazardous Environments (long version)	`Half-Life13.mp3`	1:23	Does not appear in the retail game	This track is the Valve Software theme music, a short version of which is played during the Valve logo movie in all Valve games. This track originally appeared in Half-Life as Valve Theme (long version).
*	05	Hazardous Environments (short version)	`HL1_song11.mp3`	0:35	A Red Letter Day: when Gordon puts on the HEV suit in Dr. Kleiner's lab.	An edited version of Hazardous Environments, skipping the first few seconds and concluding before further percussion can begin.
02	10	CP Violation	`HL2_song20_submix0.mp3`	1:43	Route Kanal: Early in the level in a train tunnel that has the player moving through side passages. Specifically when a Civil Protection officer pushes an explosive barrel down some stairs	The name 'CP Violation' is a double entendre, referring to both Civil Protection and the eponymous physics term.
*	13	CP Violation (remix)	`HL2_song20_submix4.mp3`	2:20	Route Kanal: Upon leaving the pool with a mixer in it, where Civil Protection rolls explosive barrels from a top ledge at the player.
03	12, 44	The Innsbruck Experiment	`HL2_song4.mp3`	1:06	Route Kanal: when first fighting Submachine Gun-wielding Metrocops that rappel down from the top of some drainage system. (first instance) Anticitizen One: When Dog shows off his strength during a fight with the Combine at the beggining of the chapter. (second instance)	Contains a sample from Zero-G's Cuckooland: Ambience sample library.^[3] This track was used in the 2004 Half-Life 2 trailer. On console versions of The Orange Box, it is played when highlighting Half-Life 2 on the menu. See 'Beam Me Up' for more information on the name. This track bears similarities to You're Not a Good Person from the Portal soundtrack, which was also composed by Kelly Bailey.
04	50	Brane Scan	`HL2_song31.mp3`	1:41	Anticitizen One: Leading up to the fight in the plaza containing the Combine generator.	The title is a play on the procedure 'brain scan' and the string theory term Brane.
05	27, 65	Dark Energy	`HL2_song3.mp3`	1:33	Highway 17: Played when leaving Shorepoint Base. Credits: Played during the first section.	Contains samples from EastWest's Tekno/Industrial sample library.^[3] The very ending of the track contains a snippet of Highway 17.
06	24	Requiem For Ravenholm	`Ravenholm_1.mp3`	0:33	'We Don't Go To Ravenholm...': After passing through the gate at the end of the courtyard and Father Grigori bids farewell, the song plays.
07	**	Pulse Phase (OST mix)	`HL2_song5.mp3`	1:07	Does not appear in the retail game	This version appears in the original soundtrack CD and in AudioSurf, as well as the 2003 Half-Life 2 leak. This track is simply a portion of Dark Energy, significantly slowed down and lowered in pitch.
*	55, 64	Pulse Phase (game mix)	`HL2_song6.mp3`	0:45	'Follow Freeman!': As the player enters the Strider battle just outside the Overwatch Nexus. (first instance) Dark Energy: When the player is descending in the elevator to face Breen. (second instance)	This version of the track appears in the retail game. It consists of the 'loop' version played four times in a row.
*	**	Pulse Phase (loop)	`HL2_song6.wav`	0:11	Does not appear in the retail game	This version only appears in the leak.
08	23	Ravenholm Reprise	`HL2_song7.mp3`	0:50	'We Don't Go To Ravenholm...': Starts playing as soon as the player exits the wooden hallway.
09	16	Probably Not a Problem	`HL2_song33.mp3`	1:24	Route Kanal: During the Headcrabshelling around the toxic water, before getting the airboat.	The track's title may be referencing a quote from Half-Life where a scientist mentions a 'small discrepancy' during the experiment at the beginning of the game, prefacing this by saying that it's 'probably not a problem.'
10	36, 52	Calabi-Yau Model	`HL2_song30.mp3`	1:46	Sandtraps: Upon entering the Vortigaunt Camp after killing the Antlion Guardian. (first instance) 'Follow Freeman!' Plays near the start of the level when entering the Zombie-infested building. (second instance)	Contains a sample from Zero-G's Ambient Vol. 1 sample library.^[3]
11	28	Slow Light	`HL2_song32.mp3`	0:45	Highway 17: Plays after the Gunship in New Little Odessa has been defeated.
12	07, 37	Apprehension and Evasion	`HL2_song29.mp3`	2:18	'A Red Letter Day': While escaping from Civil Protection through the train tracks. (first instance) Sandtraps: During the night time raid on Nova Prospekt (the bunker raiding section). (second instance)	Contains a sampled instrument from Spectrasonics' Distorted Reality sample library.^[3]
13	57	Hunter Down	`HL2_song28.mp3`	0:13	'Follow Freeman!': Played immediately after the last Strider is killed.
14	06	Our Resurrected Teleport	`HL2_song26.mp3`	1:12	'A Red Letter Day': The teleport room in Dr. Kleiner's laboratory
15	**	Miscount Detected	`HL2_song25_Teleporter.mp3`	0:48	Does not appear in the retail game	Appears in the game files, AudioSurf, and the original soundtrack CD, but nowhere in the retail game. It was supposed to play during the aborted teleport sequence in 'A Red Letter Day'. Contains a sample from Zero-G's Ambient Vol. 1 sample library.^[3]
16	**	Headhumper	`HL2_song24_Lamar.mp3`	0:08	Does not appear in the retail game	A bonus track on the original soundtrack CD and in AudioSurf. Was originally supposed to play when the player is ambushed by a Headcrab while exploring a zombie-infested shack during Water Hazard.^[1]
17	26	Triage at Dawn	`HL2_song23_SuitSong3.mp3`	0:45	'We Don't Go To Ravenholm...': At Shorepoint Base, when the battle in the garage is over.	The name is a reference to the the very situation the player finds themselves at the point it is played - Triage of Winston at dawn break. It is also known as a popular remix titled That Long Train Ride by DJ Dain, and it was also remixed by Frederick Lloyd for the trailer for The Final Hours of Half-Life: Alyx.^[4]
18	**	Combine Harvester	`HL2_song22_CombineTheme3.mp3`	1:23	Does not appear in the retail game	A bonus track on the original soundtrack CD and AudioSurf. Was originally supposed to play somewhere in the Citadel.^[5] The title is a reference to the combine harvester, a farming machine that harvests grain crops.
19	30, 43	Lab Practicum	`HL2_song2.mp3`	2:52	Highway 17: Under the train bridge. Entanglement: After exiting the teporter in Dr. Kleiner's lab, just before the beginning of Anticitizen One.	A longer version of 'Shadows Fore and Aft' without the extra sound effects.
20	38	Nova Prospekt	`HL2_song19.mp3`	1:55	Nova Prospekt: When the player initially enters the prison.	A subtle refrain from 'CP Violation' can be heard at 1:00 for around twenty seconds before dropping to a more dramatic outro.
21	15	Broken Symmetry	`HL2_song17.mp3`	1:03	Route Kanal: Upon leaving the sewers and arriving at the first toxic water area.
22	56	LG Orbifold	`HL2_song16.mp3`	2:52	'Follow Freeman!': When the player and other citizens go underground and fight Combine soldiers during the Uprising on the last map of the chapter.	Contains samples from Zero-G's Cuckooland: Asylum sample library.^[3]
23	54	Kaon	`HL2_song15.mp3`	1:11	'Follow Freeman!': When fighting the Combine Gunship over the Overwatch Nexus.	The title is a reference to the Kaon, a subatomic particle.
24	19	You're Not Supposed to Be Here	`HL2_song14.mp3`	2:41	Water Hazard: After receiving the mounted gun for the Airboat and facing the Hunter Chopper.	The title is a reference to a line the G-Man said to the player in a cut training level of Half-Life 2 that can be found in the Half-Life 2 leak. The G-Man uses the line again, this time directed at Alyx, in a trailer for Half-Life 2: Episode Two. Contains samples from EastWest's ProSamples Vol. 03: Drum & Bass 1 sample library.^[3]
25	46	Suppression Field	`HL2_song13.mp3`	0:56	Anticitizen One: While meeting your first rebel squad member of the chapter in the playground.
26	47, 48	Hard Fought (long)	`HL2_song12_long.mp3HL2_song12d.mp3`	1:13	Anticitizen One: Played twice in a row: first when assaulting a Civil Protection barricade, and then during the underground shootout while waiting for a hole to be blown open by a rebel.	This version of the track appears in the retail game. Contains samples from EastWest's ProSamples Vol. 03: Drum & Bass 1 and Zero-G's Cuckooland: Ambience sample libraries.^[3] This track also appears in the Half-Life 2: Episode One trailer.
*	**	Hard Fought (short)	`HL2_song12_short.mp3HL2_song12c.mp3`	0:44	Does not appear in the retail game	This version only appears in AudioSurf and the Half-Life 2 leak.
*	**	Hard Fought (early version)	`HL2_song12.mp3`	0:44	Does not appear in the retail game	This version only appears the Half-Life 2 leak. Also known as `31_39_01.AIF`.
27	25	Particle Ghost	`HL2_song1.mp3`	1:38	'We Don't Go To Ravenholm...': Kicks in upon leaving the Ravenholm Mines and heading into the snipers' nests outside, right before the Fast Zombie appears.
28	01	Shadows Fore and Aft	`HL2_intro.mp3`	1:25	Point Insertion: During the G-Man's speech at the start of the game.	This is shorter version of Lab Practicum with added sound effects. The whirring of Manhack blades and Kleiner's teleport can be heard in the background.
29	58	Neutrino Trap	`HL1_song9.mp3`	1:35	Our Benefactors: Upon exiting the sewer tunnel at the base of the Citadel.	Contains a sample from Zero-G's Electric Dreamz sample library.^[3] This track originally appeared in Half-Life as Hurricane Strings.
30	11	Zero Point Energy Field	`HL1_song6.mp3`	1:42	Route Kanal: When first entering the sewers after the Hunter-Chopper first attacks.	Contains samples from Zero-G's Electric Dreamz and Trance Formation sample libraries.^[3] This track originally appeared in Half-Life as Cavern Ambiance.
31	49, 59	Echoes of a Resonance Cascade	`HL1_song5.mp3`	1:38	Anticitizen One: Upon entering the underground hazardous liquid cavern with the cars. (first instance) Our Benefactors: While Freeman is in the prisoner pod, moving through the Citadel. (second instance)	Contains samples from Zero-G's Dream Zone sample library.^[3] This track originally appeared in Half-Life as Space Ocean.
32	22	Black Mesa Inbound	`HL1_song3.mp3`	2:14	Black Mesa East: The scrapyard where you first receive the Gravity Gun and meet Dog.	The name is derived from the first level of Half-Life, in which the player is making their way to the Anomalous Materials Lab. Contains samples from Zero-G's Electric Dreamz and Dream Zone sample libraries.^[3] This track originally appeared in Half-Life as Vague Voices.
33	63	Xen Relay	`HL1_song26.mp3`	0:40	Dark Energy: Upon reaching the top of the Citadel, just before meeting Dr. Breen.	This track originally appeared in Half-Life as Threatening Short.
34	**	Tracking Device (OST mix)	`HL1_song25.mp3`	1:03	Does not appear in the retail game	Contains a sample from Zero-G's Trance Formation sample library.^[3] This track is a remix of 'Credits/Closing Theme' from Half-Life. This version only appears on the soundtrack CD.
*	66	Tracking Device (game mix)	`HL1_song25_REMIX3.mp3`	1:01	Credits: Played during the second section.	This version only appears in the Half-Life 2 game files and Audiosurf.
35	42	Singularity	`HL1_song24.mp3`	1:19	Entanglement: When viewing the Nova Prospektteleport.	This track originally appeared in Half-Life as Traveling Through Limbo.
36	41	Dirac Shore	`HL1_song21.mp3`	1:27	Entanglement: When entering the flooded basement.	The name 'Dirac Shore' is a play on the physics term Dirac Sea. This track originally appeared in Half-Life as Dimensionless Deepness.
37	21	Escape Array	`HL1_song20.mp3`	1:27	Black Mesa East: At the start of the level, right after the loading screen.	This track originally appeared in Half-Life as Electric Guitar Ambiance.
38	61	Negative Pressure	`HL1_song19.mp3`	1:58	Our Benefactors: At the beginning of Dr. Breen's speech: 'You have destroyed so much. What is it exactly that you have created?'	Contains samples from Zero-G's Trance Formation and Cuckooland: Unhinged sample libraries.^[3] This track originally appeared in Half-Life as Steam in the Pipes, and also appears in Half-Life 2: Episode One.
39	29	Tau-9	`HL1_song17.mp3`	2:06	Highway 17: When first reaching the crane.	This track originally appeared in Half-Life as Drums and Riffs.
40	33	Something Secret Steers Us	`HL1_song15.mp3`	2:03	Sandtraps: At Lighthouse Point during the Dropship attack.	The title is a reference to a sentence said by the All-Knowing Vortigaunt. Contains samples from EastWest's Symphonic Adventures production music library and Zero-G's Cuckooland: Unhinged sample library.^[3] This track originally appeared in Half-Life as Nuclear Mission Jam.
41	51	Triple Entanglement	`HL1_song14.mp3`	1:32	Anticitizen One: Upon entering the Zombie infested sewers near the end of the chapter.	This track is a remix of Sirens in the Distance from Half-Life.
42	**	Biozeminade Fragment	`HL1_song13.mp3`	0:32	Does not appear in the retail game	A bonus track on the original soundtrack CD, though it does not appear in the retail game files or AudioSurf. The name is an homage to an early Amazon.com joke review for Half-Life 2 in which a fan claimed the game had Biozeminades in it.^[1]^[6] Contains a sample from Zero-G's Cuckooland: Unhinged sample library.^[3] This track is a sped-up version of Alien Shock from Half-Life.
43	18	Lambda Core	`HL1_song10.mp3`	1:45	Water Hazard: When fleeing from the second Hunter-Chopper while driving through large cement pipes.	Contains samples from Sounds Good's Methods of Mayhem: Industrial Toolkit sample library.^[3] This track originally appeared in Half-Life as Diabolical Adrenaline Guitar.
*	39	Entanglement	`HL2_song0.mp3`	0:39	Nova Prospekt: Upon entering the Combine Wall crushing canyon at end of chapter, just before meeting Alyx.	This track only appears in the Half-Life 2 game files.
*	09	Entanglement (loop)	`HL2_ambient_1.wav`	0:08	Route Kanal: When exiting the first underground section, before climbing on top of the moving train.	This track only appears in the Half-Life 2 game files. Was originally only in the leak until the June 2013 SteamPipe update. It is the only track to play as an ambient sound.
*	32	Highway 17	`HL2_song8.mp3`	0:59	Sandtraps: At the house by the coast where Combine soldiers are burning bodies.	This version of the track appears in the retail game. It consists of the 'loop' version played four times in a row.
*	**	Highway 17 (loop)	`HL2_song8.wav`	0:15	Does not appear in the retail game	This version only appears in the leak.
*	04	A Red Letter Day	`HL2_song10.mp3`	0:29	'A Red Letter Day': When entering Dr. Kleiner's lab.	This track consists of part of a sample from Zero-G's 'Cuckooland: Ambience' sample library.^[3]
*	31	Sandtraps	`HL2_song11.mp3`	0:34	Sandtraps: At the zombie-infested area of the tunnels.	Also known by the filename `31_56_01.AIF`. Was originally supposed to have an earlier appearance in Route Kanal, during the first Barnacle encounter, right before Civil Protection executes a group of rebels. Consists of a slowed-down sample from Zero-G's 'Cuckooland: Ambience' sample library.^[3]
*	02	Train Station 1	`HL2_song26_trainstation1.mp3`	1:30	Point Insertion: When entering the outdoor plaza with the Breencast.	This track consists of a sample from Zero-G's 'Cuckooland: Ambience' sample library.^[3]
*	03, 53	Train Station 2	`HL2_song27_trainstation2.mp3`	1:12	Point Insertion: When running on the rooftops from Civil Protection. (first instance) 'Follow Freeman!': When entering the lobby in the Overwatch Nexus with Barney. (second instance)
*	45	Radio	`radio1.mp3`	0:39	Anticitizen One: When entering the room adjacent to the closet with the TV showing the G-Man.	This track consists of samples from Zero-G's 'Cuckooland: Ghost in the Machine' sample library.^[3]
*	17, 60	Industrial Suspense 1	`industrial_suspense1.wav`	0:12	Water Hazard: In the beginning of the chapter, upon seeing a citizen dropping supply crates from a bridge. (first instance) Our Benefactors: Right after Dr. Breen's 'I am nothing if not pragmatic' speech. (second instance)	This track also appears in Half-Life 2: Episode Two.
*	62	Industrial Suspense 2	`industrial_suspense2.wav`	0:11	Our Benefactors: After Dr. Breen's 'laying the foundation for humanity' speech and jumping down, before the Strider battle.
*	40	Apprehensive Short	`HL1_stinger_song7.mp3`	0:23	Entanglement: When Eli's Combine pod opens up at the window with Alyx and the player.	Contains a sample from EastWest's Symphonic Adventures production music library.^[3] This track originally appeared in Half-Life.
*	08	Bass String Short	`HL1_stinger_song8.mp3`	0:09	Route Kanal: When Civil Protection is beating up the couple, right before the player gets the pistol.	Contains a sample from EastWest's Symphonic Adventures production music library.^[3] This track originally appeared in Half-Life.
*	34	Scared Confusion Short	`HL1_stinger_song16.mp3`	0:16	Sandtraps: Right before the Antlion Guard battle outside the Vortigaunt camp.	Contains a sample from EastWest's Symphonic Adventures production music library.^[3] This track originally appeared in Half-Life.
*	14	Dark Piano Short	`HL1_stinger_song27.mp3`	0:17	Route Kanal: When entering the room full of explosive barrels and Manhacks.	Contains a sample from EastWest's Symphonic Adventures production music library.^[3] This track originally appeared in Half-Life.
*	20, 35	Sharp Fear Short	`HL1_stinger_song28.mp3`	0:07	Water Hazard: When the Hunter-Chopper is destroyed. (first instance) Sandtraps: When the Antlion guard emerges outside the Vortigaunt camp. (second instance)	Contains a sample from EastWest's Symphonic Adventures production music library.^[3] This track originally appeared in Half-Life, and also appears in the Half-Life 2: Episode One trailer.

Track listing[edit]* = not present in a given soundtrack.
The Orange Box OST # Game # OST (Steam DLC) # Track title Filename Time Level location Comments
 * 01 04Extinction Event HorizonVLVX_song20.mp3 2:04To the White Forest: The very beginning of the chapter, as Gordon is climbing out of the train wreck. The title is likely indicative of the impending return of multitudinous Combine forces through the Citadel's superportal, which would result in a genocide of humanity, or an extinction event, and how this, for humanity's survival, would be an inescapable 'point of no return,' which in layman's terms is what an event horizon is in regards to spacetime in astrophysics.
 12 02 05Vortal CombatVLVX_song22.mp3 3:14This Vortal Coil: During the final wave of the Antlion attack, in which the vortigaunts assist Gordon Freeman in the fight.
The song can also be heard during part of the Portal teaser trailer. The title is a pun on both Vortigaunts and the Mortal Kombat game series.
 * 03 03NectariumVLVX_song15.mp3 1:47This Vortal Coil: When the Lone Vort finds the larval extract.
 * 04 10Inhuman FrequencyVLVX_song26.mp3 1:50This Vortal Coil: During the G-Man sequence, when the G-Man talks to Gordon as the Vortigaunts attempt to heal Alyx.
 * 05 *Crawl YardVLVX_song9.mp3 1:14Freeman Pontifex: Near one of the radioactive lakes.
 * 06 *Industrial Suspense 1industrial_suspense1.wav 0:12Riding Shotgun: Upon finding the dead rebel before encountering the Barn Advisor. This track also appears in Half-Life 2.
 * 07 07Shu'ulathoiVLVX_song23ambient.mp3 2:38Riding Shotgun: During the scene with the Barn Advisor. This track title is a reference to the Vortigaunt name given to the Combine Advisors.
 10 08 06Sector SweepVLVX_song23.mp3 2:46Riding Shotgun: During the Combine ambush directly after the meeting with the Barn Advisor. In the console versions of The Orange Box, this song is played at the main menu for the Episode Two screen.
 * 09 11Hunting PartyVLVX_song27.mp3 3:29Riding Shotgun: During the Hunter ambush.
 * 10 01No One Rides For FreeVLVX_song0.mp3 1:02Under the Radar: When first driving away from the junkyard after destroying the Autogun.
 * 11 12Eon TrapVLVX_song28.mp3 3:13Under the Radar: During the ambush at the White Forest Inn.
 06 12 09Abandoned In PlaceVLVX_song25.mp3 2:47Our Mutual Fiend: During the Combine invasion of the White Forest Base, during the mission to close the second silo.
 08 13 08Last LegsVLVX_song24.mp3 2:07Our Mutual Fiend: When fighting the second wave of Striders and Hunters during the attack on the missile silo.
 11 14 02Dark IntervalVLVX_song3.mp3 1:35T-Minus One: Starts during the final scene and continues over the credits. Also plays in Half-Life 2: Lost Coast, when first entering the St. Olga monastery. A section of the track reappears in the final scene of Half-Life: Alyx.
External links[edit]Half-Life 2: Episode Two Soundtrack on Steam
Half-Life Music Soundtracks on official Half-Life website
Real world subjects
SoundtracksHalf-Life · Half-Life: Opposing Force · Half-Life: Blue Shift · Half-Life 2 · Half-Life 2: Episode One · Half-Life 2: Episode Two · Half-Life: Alyx ·The Orange Box · Portal · Portal 2
Songs'Exile Vilify' · 'Cara Mia Adio (Turret Opera)' · 'GLaDOS' Song' (cut) · 'Still Alive' · 'Want You Gone' · 'You Wouldn't Know'
CompaniesArkane Studios · Captivation Digital Laboratories · Cloudhead Games · Cryptozoic Entertainment · Electronic Arts · Gearbox Software · Junction Point Studios · Nvidia Corporation · Sierra Entertainment · Sixense Entertainment · Traveller's Tales · Taito Corporation · Valve Corporation · Vivendi Games · Zen Studios
PeopleCharacter models · Production staff · Voice actors
Other mediaComics:Portal 2: Lab Rat · Randolph the Red-Nosed Turret · Turret LullabyDevelopment booksandarticles:The Art of Portal 2 · The Final Hours of Half-Life 2 · The Final Hours of Portal 2 · Half-Life 2: Raising the Bar · The Final Hours of Half-Life: Alyx
Films:Half-Life: Uplink
MascotsBendy · Mr. Valve
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↑Ipecac Recordings on Twitter (March 16, 2020)
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From Combine OverWiki, the original Half-Life wiki and Portal wiki
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Power Starz SoundtrackSteam album artwork.
The Half-Life 2 soundtrack was composed by Kelly Bailey. It is an amalgamation of newly-composed music and several cues from Bailey's previous work on Half-Life. Most, if not all, of the tracks were named by Marc Laidlaw.[1]
The limited edition Half-Life 2 'Gold' package included, among other exclusive extras, a CD soundtrack. Although the CD contains several exclusive tracks, it does not include all of the music heard in the game. Using an appropriate program, it is possible to extract all audio tracks heard in-game from the hl2_sound_misc_dir.vpk archive file. The soundtrack (save the CD versions of tracks 1 and 34) was also included in the game directory of both the full and demo Audiosurf releases on Steam as part of Audiosurf's The Orange Box Soundtrack. On September 24, 2014, the soundtrack was made available as free DLC to all owners of the game on Steam. On March 16, 2020, Valve partnered with independent record label Ipecac Recordings to release several of the Half-Life series soundtracks on streaming services.[2]
Track listing[edit]* = not present on the Half-Life 2 Original Soundtrack CD.
** = not present in Half-Life 2 game files.
 OST # Game # Track title Filename Time Level location Comments
 01 **Hazardous Environments (long version)Half-Life13.mp3 1:23Does not appear in the retail game This track is the Valve Software theme music, a short version of which is played during the Valve logo movie in all Valve games. This track originally appeared in Half-Life as Valve Theme (long version).
 * 05Hazardous Environments (short version)HL1_song11.mp3 0:35A Red Letter Day: when Gordon puts on the HEV suit in Dr. Kleiner's lab. An edited version of Hazardous Environments, skipping the first few seconds and concluding before further percussion can begin.
 02 10CP ViolationHL2_song20_submix0.mp3 1:43Route Kanal: Early in the level in a train tunnel that has the player moving through side passages. Specifically when a Civil Protection officer pushes an explosive barrel down some stairs The name 'CP Violation' is a double entendre, referring to both Civil Protection and the eponymous physics term.
 * 13CP Violation (remix)HL2_song20_submix4.mp3 2:20Route Kanal: Upon leaving the pool with a mixer in it, where Civil Protection rolls explosive barrels from a top ledge at the player.
 03 12, 44The Innsbruck ExperimentHL2_song4.mp3 1:06Route Kanal: when first fighting Submachine Gun-wielding Metrocops that rappel down from the top of some drainage system. (first instance)Anticitizen One: When Dog shows off his strength during a fight with the Combine at the beggining of the chapter. (second instance)
 Contains a sample from Zero-G's Cuckooland: Ambience sample library.[3] This track was used in the 2004 Half-Life 2 trailer. On console versions of The Orange Box, it is played when highlighting Half-Life 2 on the menu. See 'Beam Me Up' for more information on the name.This track bears similarities to You're Not a Good Person from the Portal soundtrack, which was also composed by Kelly Bailey.
 04 50Brane ScanHL2_song31.mp3 1:41Anticitizen One: Leading up to the fight in the plaza containing the Combine generator. The title is a play on the procedure 'brain scan' and the string theory term Brane.
 05 27, 65Dark EnergyHL2_song3.mp3 1:33Highway 17: Played when leaving Shorepoint Base.Credits: Played during the first section.
 Contains samples from EastWest's Tekno/Industrial sample library.[3] The very ending of the track contains a snippet of Highway 17.
 06 24Requiem For RavenholmRavenholm_1.mp3 0:33'We Don't Go To Ravenholm...': After passing through the gate at the end of the courtyard and Father Grigori bids farewell, the song plays.
 07 **Pulse Phase (OST mix)HL2_song5.mp3 1:07Does not appear in the retail game This version appears in the original soundtrack CD and in AudioSurf, as well as the 2003 Half-Life 2 leak. This track is simply a portion of Dark Energy, significantly slowed down and lowered in pitch.
 * 55, 64Pulse Phase (game mix)HL2_song6.mp3 0:45'Follow Freeman!': As the player enters the Strider battle just outside the Overwatch Nexus. (first instance)Dark Energy: When the player is descending in the elevator to face Breen. (second instance)
 This version of the track appears in the retail game. It consists of the 'loop' version played four times in a row.
 * **Pulse Phase (loop)HL2_song6.wav 0:11Does not appear in the retail game This version only appears in the leak.
 08 23Ravenholm RepriseHL2_song7.mp3 0:50'We Don't Go To Ravenholm...': Starts playing as soon as the player exits the wooden hallway.
 09 16Probably Not a ProblemHL2_song33.mp3 1:24Route Kanal: During the Headcrabshelling around the toxic water, before getting the airboat. The track's title may be referencing a quote from Half-Life where a scientist mentions a 'small discrepancy' during the experiment at the beginning of the game, prefacing this by saying that it's 'probably not a problem.'
 10 36, 52Calabi-Yau ModelHL2_song30.mp3 1:46Sandtraps: Upon entering the Vortigaunt Camp after killing the Antlion Guardian. (first instance)'Follow Freeman!' Plays near the start of the level when entering the Zombie-infested building. (second instance)
 Contains a sample from Zero-G's Ambient Vol. 1 sample library.[3]
 11 28Slow LightHL2_song32.mp3 0:45Highway 17: Plays after the Gunship in New Little Odessa has been defeated.
 12 07, 37Apprehension and EvasionHL2_song29.mp3 2:18'A Red Letter Day': While escaping from Civil Protection through the train tracks. (first instance)Sandtraps: During the night time raid on Nova Prospekt (the bunker raiding section). (second instance)
 Contains a sampled instrument from Spectrasonics' Distorted Reality sample library.[3]
 13 57Hunter DownHL2_song28.mp3 0:13'Follow Freeman!': Played immediately after the last Strider is killed.
 14 06Our Resurrected TeleportHL2_song26.mp3 1:12'A Red Letter Day': The teleport room in Dr. Kleiner's laboratory
 15 **Miscount DetectedHL2_song25_Teleporter.mp3 0:48Does not appear in the retail game Appears in the game files, AudioSurf, and the original soundtrack CD, but nowhere in the retail game. It was supposed to play during the aborted teleport sequence in 'A Red Letter Day'. Contains a sample from Zero-G's Ambient Vol. 1 sample library.[3]
 16 **HeadhumperHL2_song24_Lamar.mp3 0:08Does not appear in the retail game A bonus track on the original soundtrack CD and in AudioSurf. Was originally supposed to play when the player is ambushed by a Headcrab while exploring a zombie-infested shack during Water Hazard.[1]
 17 26Triage at DawnHL2_song23_SuitSong3.mp3 0:45'We Don't Go To Ravenholm...': At Shorepoint Base, when the battle in the garage is over. The name is a reference to the the very situation the player finds themselves at the point it is played - Triage of Winston at dawn break. It is also known as a popular remix titled That Long Train Ride by DJ Dain, and it was also remixed by Frederick Lloyd for the trailer for The Final Hours of Half-Life: Alyx.[4]
 18 **Combine HarvesterHL2_song22_CombineTheme3.mp3 1:23Does not appear in the retail game A bonus track on the original soundtrack CD and AudioSurf. Was originally supposed to play somewhere in the Citadel.[5] The title is a reference to the combine harvester, a farming machine that harvests grain crops.
 19 30, 43Lab PracticumHL2_song2.mp3 2:52Highway 17: Under the train bridge.Entanglement: After exiting the teporter in Dr. Kleiner's lab, just before the beginning of Anticitizen One.
 A longer version of 'Shadows Fore and Aft' without the extra sound effects.
 20 38Nova ProspektHL2_song19.mp3 1:55Nova Prospekt: When the player initially enters the prison. A subtle refrain from 'CP Violation' can be heard at 1:00 for around twenty seconds before dropping to a more dramatic outro.
 21 15Broken SymmetryHL2_song17.mp3 1:03Route Kanal: Upon leaving the sewers and arriving at the first toxic water area.
 22 56LG OrbifoldHL2_song16.mp3 2:52'Follow Freeman!': When the player and other citizens go underground and fight Combine soldiers during the Uprising on the last map of the chapter. Contains samples from Zero-G's Cuckooland: Asylum sample library.[3]
 23 54KaonHL2_song15.mp3 1:11'Follow Freeman!': When fighting the Combine Gunship over the Overwatch Nexus. The title is a reference to the Kaon, a subatomic particle.
 24 19You're Not Supposed to Be HereHL2_song14.mp3 2:41Water Hazard: After receiving the mounted gun for the Airboat and facing the Hunter Chopper. The title is a reference to a line the G-Man said to the player in a cut training level of Half-Life 2 that can be found in the Half-Life 2 leak. The G-Man uses the line again, this time directed at Alyx, in a trailer for Half-Life 2: Episode Two. Contains samples from EastWest's ProSamples Vol. 03: Drum & Bass 1 sample library.[3]
 25 46Suppression FieldHL2_song13.mp3 0:56Anticitizen One: While meeting your first rebel squad member of the chapter in the playground.
 26 47, 48Hard Fought (long)HL2_song12_long.mp3HL2_song12d.mp3 1:13Anticitizen One: Played twice in a row: first when assaulting a Civil Protection barricade, and then during the underground shootout while waiting for a hole to be blown open by a rebel. This version of the track appears in the retail game. Contains samples from EastWest's ProSamples Vol. 03: Drum & Bass 1 and Zero-G's Cuckooland: Ambience sample libraries.[3] This track also appears in the Half-Life 2: Episode One trailer.
 * **Hard Fought (short)HL2_song12_short.mp3HL2_song12c.mp3 0:44Does not appear in the retail game This version only appears in AudioSurf and the Half-Life 2 leak.
 * **Hard Fought (early version)HL2_song12.mp3 0:44Does not appear in the retail game This version only appears the Half-Life 2 leak. Also known as 31_39_01.AIF.
 27 25Particle GhostHL2_song1.mp3 1:38'We Don't Go To Ravenholm...': Kicks in upon leaving the Ravenholm Mines and heading into the snipers' nests outside, right before the Fast Zombie appears.
 28 01Shadows Fore and AftHL2_intro.mp3 1:25Point Insertion: During the G-Man's speech at the start of the game. This is shorter version of Lab Practicum with added sound effects. The whirring of Manhack blades and Kleiner's teleport can be heard in the background.
 29 58Neutrino TrapHL1_song9.mp3 1:35Our Benefactors: Upon exiting the sewer tunnel at the base of the Citadel. Contains a sample from Zero-G's Electric Dreamz sample library.[3] This track originally appeared in Half-Life as Hurricane Strings.
 30 11Zero Point Energy FieldHL1_song6.mp3 1:42Route Kanal: When first entering the sewers after the Hunter-Chopper first attacks. Contains samples from Zero-G's Electric Dreamz and Trance Formation sample libraries.[3] This track originally appeared in Half-Life as Cavern Ambiance.
 31 49, 59Echoes of a Resonance CascadeHL1_song5.mp3 1:38Anticitizen One: Upon entering the underground hazardous liquid cavern with the cars. (first instance)Our Benefactors: While Freeman is in the prisoner pod, moving through the Citadel. (second instance)
 Contains samples from Zero-G's Dream Zone sample library.[3] This track originally appeared in Half-Life as Space Ocean.
 32 22Black Mesa InboundHL1_song3.mp3 2:14Black Mesa East: The scrapyard where you first receive the Gravity Gun and meet Dog. The name is derived from the first level of Half-Life, in which the player is making their way to the Anomalous Materials Lab. Contains samples from Zero-G's Electric Dreamz and Dream Zone sample libraries.[3] This track originally appeared in Half-Life as Vague Voices.
 33 63Xen RelayHL1_song26.mp3 0:40Dark Energy: Upon reaching the top of the Citadel, just before meeting Dr. Breen. This track originally appeared in Half-Life as Threatening Short.
 34 **Tracking Device (OST mix)HL1_song25.mp3 1:03Does not appear in the retail game Contains a sample from Zero-G's Trance Formation sample library.[3] This track is a remix of 'Credits/Closing Theme' from Half-Life. This version only appears on the soundtrack CD.
 * 66Tracking Device (game mix)HL1_song25_REMIX3.mp3 1:01Credits: Played during the second section. This version only appears in the Half-Life 2 game files and Audiosurf.
 35 42SingularityHL1_song24.mp3 1:19Entanglement: When viewing the Nova Prospektteleport. This track originally appeared in Half-Life as Traveling Through Limbo.
 36 41Dirac ShoreHL1_song21.mp3 1:27Entanglement: When entering the flooded basement. The name 'Dirac Shore' is a play on the physics term Dirac Sea. This track originally appeared in Half-Life as Dimensionless Deepness.
 37 21Escape ArrayHL1_song20.mp3 1:27Black Mesa East: At the start of the level, right after the loading screen. This track originally appeared in Half-Life as Electric Guitar Ambiance.
 38 61Negative PressureHL1_song19.mp3 1:58Our Benefactors: At the beginning of Dr. Breen's speech: 'You have destroyed so much. What is it exactly that you have created?' Contains samples from Zero-G's Trance Formation and Cuckooland: Unhinged sample libraries.[3] This track originally appeared in Half-Life as Steam in the Pipes, and also appears in Half-Life 2: Episode One.
 39 29Tau-9HL1_song17.mp3 2:06Highway 17: When first reaching the crane. This track originally appeared in Half-Life as Drums and Riffs.
 40 33Something Secret Steers UsHL1_song15.mp3 2:03Sandtraps: At Lighthouse Point during the Dropship attack. The title is a reference to a sentence said by the All-Knowing Vortigaunt. Contains samples from EastWest's Symphonic Adventures production music library and Zero-G's Cuckooland: Unhinged sample library.[3] This track originally appeared in Half-Life as Nuclear Mission Jam.
 41 51Triple EntanglementHL1_song14.mp3 1:32Anticitizen One: Upon entering the Zombie infested sewers near the end of the chapter. This track is a remix of Sirens in the Distance from Half-Life.
 42 **Biozeminade FragmentHL1_song13.mp3 0:32Does not appear in the retail game A bonus track on the original soundtrack CD, though it does not appear in the retail game files or AudioSurf. The name is an homage to an early Amazon.com joke review for Half-Life 2 in which a fan claimed the game had Biozeminades in it.[1][6] Contains a sample from Zero-G's Cuckooland: Unhinged sample library.[3] This track is a sped-up version of Alien Shock from Half-Life.
 43 18Lambda CoreHL1_song10.mp3 1:45Water Hazard: When fleeing from the second Hunter-Chopper while driving through large cement pipes. Contains samples from Sounds Good's Methods of Mayhem: Industrial Toolkit sample library.[3] This track originally appeared in Half-Life as Diabolical Adrenaline Guitar.
 * 39EntanglementHL2_song0.mp3 0:39Nova Prospekt: Upon entering the Combine Wall crushing canyon at end of chapter, just before meeting Alyx. This track only appears in the Half-Life 2 game files.
 * 09Entanglement (loop)HL2_ambient_1.wav 0:08Route Kanal: When exiting the first underground section, before climbing on top of the moving train. This track only appears in the Half-Life 2 game files. Was originally only in the leak until the June 2013 SteamPipe update. It is the only track to play as an ambient sound.
 * 32Highway 17HL2_song8.mp3 0:59Sandtraps: At the house by the coast where Combine soldiers are burning bodies. This version of the track appears in the retail game. It consists of the 'loop' version played four times in a row.
 * **Highway 17 (loop)HL2_song8.wav 0:15Does not appear in the retail game This version only appears in the leak.
 * 04A Red Letter DayHL2_song10.mp3 0:29'A Red Letter Day': When entering Dr. Kleiner's lab. This track consists of part of a sample from Zero-G's 'Cuckooland: Ambience' sample library.[3]
 * 31SandtrapsHL2_song11.mp3 0:34Sandtraps: At the zombie-infested area of the tunnels. Also known by the filename 31_56_01.AIF. Was originally supposed to have an earlier appearance in Route Kanal, during the first Barnacle encounter, right before Civil Protection executes a group of rebels. Consists of a slowed-down sample from Zero-G's 'Cuckooland: Ambience' sample library.[3]
 * 02Train Station 1HL2_song26_trainstation1.mp3 1:30Point Insertion: When entering the outdoor plaza with the Breencast. This track consists of a sample from Zero-G's 'Cuckooland: Ambience' sample library.[3]
 * 03, 53Train Station 2HL2_song27_trainstation2.mp3 1:12Point Insertion: When running on the rooftops from Civil Protection. (first instance)'Follow Freeman!': When entering the lobby in the Overwatch Nexus with Barney. (second instance)
 * 45Radioradio1.mp3 0:39Anticitizen One: When entering the room adjacent to the closet with the TV showing the G-Man. This track consists of samples from Zero-G's 'Cuckooland: Ghost in the Machine' sample library.[3]
 * 17, 60Industrial Suspense 1industrial_suspense1.wav 0:12Water Hazard: In the beginning of the chapter, upon seeing a citizen dropping supply crates from a bridge. (first instance)Our Benefactors: Right after Dr. Breen's 'I am nothing if not pragmatic' speech. (second instance)
 This track also appears in Half-Life 2: Episode Two.
 * 62Industrial Suspense 2industrial_suspense2.wav 0:11Our Benefactors: After Dr. Breen's 'laying the foundation for humanity' speech and jumping down, before the Strider battle.
 * 40Apprehensive ShortHL1_stinger_song7.mp3 0:23Entanglement: When Eli's Combine pod opens up at the window with Alyx and the player. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 08Bass String ShortHL1_stinger_song8.mp3 0:09Route Kanal: When Civil Protection is beating up the couple, right before the player gets the pistol. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 34Scared Confusion ShortHL1_stinger_song16.mp3 0:16Sandtraps: Right before the Antlion Guard battle outside the Vortigaunt camp. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 14Dark Piano ShortHL1_stinger_song27.mp3 0:17Route Kanal: When entering the room full of explosive barrels and Manhacks. Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life.
 * 20, 35Sharp Fear ShortHL1_stinger_song28.mp3 0:07Water Hazard: When the Hunter-Chopper is destroyed. (first instance)Sandtraps: When the Antlion guard emerges outside the Vortigaunt camp. (second instance)
 Contains a sample from EastWest's Symphonic Adventures production music library.[3] This track originally appeared in Half-Life, and also appears in the Half-Life 2: Episode One trailer.
External links[edit]Half Life 2 Episode 2 SoundtrackHalf-Life 2 Soundtrack on Steam
Half-Life Music Soundtracks on official Half-Life website
References[edit]↑ 1.01.11.2Marc Laidlaw on the titles of Half-Life 2 soundtrack
↑Ipecac Recordings on Twitter (March 16, 2020)
↑ 3.003.013.023.033.043.053.063.073.083.093.103.113.123.133.143.153.163.173.183.193.203.213.223.233.243.25VGM Sound Sources
↑Frederick Lloyd on Twitter
↑An entry for hl2_song22_combineTheme3 appears in level_sounds_citadel.txt.
↑Half-Life 2, Customer Review on Amazon.com (August 2, 2003)
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Half Life 2 Episode 1 Soundtrack Retrieved from 'https://combineoverwiki.net/index.php?title=Half-Life_2_soundtrack&oldid=452389' 