List of Half-Life 2 music

Here is a list of music tracks used in Half-Life 2 series. also contains tracks from . The 's in the raw file paths tell the engine that the sound should be affected by the Music slider in the game's settings.
 
== Songs ==
=== Half-Life 2 ===
Game Sound Name	Raw File Path 	Album Track Title 	Description 	Length
 	 	Entanglement 	This track only appears in the Half-Life 2 game files.Nova Prospekt (d2_prison_05): Upon entering the Combine Wall crushing canyon at end of chapter, just before meeting Alyx. 	0:40
 	 	Particle Ghost 	"We Don't Go To Ravenholm..." (d1_town_05): Kicks in upon leaving the Ravenholm Mines and heading into the snipers' nests outside, right before the Fast Zombie appears 	1:38
 	 	Lab Practicum 	Highway 17 (d2_coast_08): Under the train bridge. 	2:52
 	 	Dark Energy 	 	1:31
 	 	The Innsbruck Experiment 	Route Kanal (d1_canals_03): When first fighting Submachine Gun-wielding Metrocops that rappel down from the top of some drainage system. 	1:05
 	 	Pulse Phase (OST mix) 	This version appears in the original soundtrack CD and in AudioSurf, This track is simply a portion of Dark Energy, significantly slowed down and lowered in pitch. 	1:07
 	 	Pulse Phase (game mix) 	"Follow Freeman!" (d3_c17_12): As the player enters the Strider battle just outside the Overwatch Nexus.Dark Energy (d3_breen_01): When the player is descending in the elevator to face Breen. 	0:45
 	 	Ravenholm Reprise 	"We Don't Go To Ravenholm..." (d1_town_01): Starts playing as soon as the player exits the wooden hallway. 	0:50
 	 	 	 	1:00
 	 	A Red Letter Day 	"A Red Letter Day" (d1_trainstation_05): When entering Dr. Kleiner's lab. 	0:29
 	 	 	 	0:35
 	 	Hard Fought (short) 	This version only appears in AudioSurf and the Half-Life 2 leak. 	0:44
 	 	Hard Fought 	Anticitizen One (d3_c17_05 & d3_c17_06a): 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. 	1:13
 	 	Suppression Field 	Anticitizen One (d3_c17_03): While meeting your first rebel squad member of the chapter in the playground 	0:56
 	 	You're Not Supposed to Be Here 	 	2:39
 	 	Kaon 	"Follow Freeman!" (d3_c17_11): When fighting the Combine Gunship over the Overwatch Nexus. 	1:11
 	 	LG Orbifold 	"Follow Freeman!" (d3_c17_13): When the player and other citizens go underground and fight Combine soldiers during the Uprising on the last map of the chapter. 	2:52
 	 	Broken Symmetry 	 	1:01
 	 	Nova Prospekt 	Nova Prospekt (d2_prison_02): When the player initially enters the prison. 	1:55
 	 	CP Violation 	Route Kanal (d1_canals_01): Early in the level in a train tunnel that has the player moving through side passages. 	1:43
 	 	CP Violation (remix) 	Route Kanal (d1_canals_03): Upon leaving the pool with a mixer in it, where Civil Protection rolls explosive barrels from a top ledge at the player. 	2:20
 	 	Combine Harvester 	A bonus track on the original soundtrack CD and AudioSurf. Was originally supposed to play somewhere in the Citadel. 	1:23
 	 	Triage at Dawn 	 	0:43
 	 	Headhumper 	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. 	0:08
 	 	Miscount Detected 	Appears in the game files, AudioSurf, and the original soundtrack CD, but nowhere in the retail game. 	0:48
 	 	Our Resurrected Teleport 	"A Red Letter Day" (d1_trainstation_05): The teleport room in Dr. Kleiner's laboratory 	1:12
 	 	 	 	1:31
 	 	Train Station 2 	Point Insertion (d1_trainstation_04): When running on the rooftops from Civil Protection."Follow Freeman!" (d3_c17_10b): When entering the lobby of the Overwatch Nexus with Barney. (second instance) 	1:12
 	 	Hunter Down 	"Follow Freeman!" (d3_c17_13): Played immediately after the last Strider is killed 	0:13
 	 	Apprehension and Evasion 	Sandtraps (d2_coast_12): During the night time raid on Nova Prospekt (the bunker raiding section). 	2:18
 	 	Calabi-Yau Model 	"Follow Freeman!" (d3_c17_09): Plays near the start of the level when entering the Zombie-infested building. 	1:44
 	 	Brane Scan 	Anticitizen One (d3_c17_07): Leading up to the fight in the plaza containing the Combine generator. 	1:39
 	 	Dark Energy 	Highway 17 (d2_coast_01): Played when leaving Shorepoint Base. 	0:43
 	 	Probably Not A Problem 	 	1:24
 	 	Shadows Fore and Aft 	Point Insertion (d1_trainstation_01): During the G-Man's speech at the start of the game. 	1:25
 	 	Identical to the above. 	Identical to the above. 	1:25
 	 	Radio 	Anticitizen One (d3_c17_02): When entering the room adjacent to the closet with the TV showing the G-Man. 	0:39
 	 	Requiem For Ravenholm 	"We Don't Go To Ravenholm..." (d1_town_02a): After passing through the gate at the end of the courtyard and Father Grigori bids farewell, the song plays. 	0:31
 	 	Broken Symmetry 	Route Kanal (d1_canals_05): Upon leaving the sewers and arriving at the first toxic water area. 	1:03
 	 	Probably Not a Problem 	Route Kanal (d1_canals_05): During the Headcrab shelling around the toxic water, before getting the airboat. 	1:24
 	 	 	 	0:00
 	 	You're Not Supposed to Be Here 	Water Hazard (d1_canals_11): After receiving the mounted gun for the Airboat and facing the Hunter Chopper. 	2:41
 	 	 	 	0:07
 	 	Lab Practicum 	Entanglement (d3_c17_01): After exiting the teleport in Dr. Kleiner's lab, just before the beginning of Anticitizen One. 	2:52
 	 	The Innsbruck Experiment 	Anticitizen One (d3_c17_02): When Dog shows off his strength during a fight with the Combine at the beginning of the chapter. 	1:06
 	 	Negative Pressure 	Our Benefactors (d3_citadel_04): At the beginning of Dr. Breen's speech: "You have destroyed so much. What is it exactly that you have created?" 	1:58
 	 	Xen Relay 	Dark Energy (d3_breen_01): Upon reaching the top of the Citadel, just before meeting Dr. Breen. 	0:40
 	 	Tau-9 	Highway 17 (d2_coast_04): When using the magnetic crane. 	2:06
 	 	Sandtraps 	Sandtraps (d2_coast_09): At the zombie-infested area of the tunnels. 	0:34
 	 	Highway 17 	Sandtraps (d2_coast_09): At the house by the coast where Combine soldiers are burning bodies. 	0:59
 	 	Slow Light 	Highway 17 (d2_coast_03): Plays after the Gunship in New Little Odessa has been defeated. 	0:45
 	 	Apprehension and Evasion 	"A Red Letter Day" (d1_trainstation_06): While escaping from Civil Protection through the train tracks 	2:18
 	 	Triage at Dawn 	"We Don't Go To Ravenholm..." (d1_town_05): At Shorepoint Base, when the battle in the garage is over. 	0:45
 	 	Dirac Shore 	Entanglement (d2_prison_07): When entering the flooded basement. 	1:27
 	 	Train Station 1 	Point Insertion (d1_trainstation_02): When entering the outdoor plaza with the Breencast. 	1:30
 	 	 	Plays when you're up on the ridge before the antlion guard arena. 	0:16
 	 	 	Plays when the antlion guard first shows himself. 	0:07
 	 	Dark Energy 	Credits: Played during the first section. 	1:31
 	 	Tracking Device (game mix) 	Credits: Played during the second section. 	1:01
 	 	Entanglement 	Nova Prospekt (d2_prison_05): Upon entering the Combine Wall crushing canyon at end of chapter, just before meeting Alyx. 	0:39
 	 	Calabi-Yau Model 	Sandtraps (d2_coast_11): Upon entering the Vortigaunt Camp after killing the Antlion Guardian. 	1:44
Originally from	Originally from	Originally from 	Originally from 	Originally from
 	 	Black Mesa Inbound 	Black Mesa East (d1_eli_02): The scrapyard where you first receive the Gravity Gun and meet Dog. 	2:12
 	 	Echoes of a Resonance Cascade 	Anticitizen One (d3_c17_06a): Upon entering the underground hazardous liquid cavern with the cars. (first instance)
Our Benefactors (d3_citadel_02): While Gordon is in the prisoner pod, moving through the Citadel. 	1:36
 	 	Zero Point Energy Field 	Route Kanal (d1_canals_02): When first entering the sewers after the Hunter-Chopper first attacks. 	1:42
 	 	Neutrino Trap 	Our Benefactors (d3_citadel_01): Upon exiting the sewer tunnel at the base of the Citadel 	1:35
 	 	Lambda Core 	Water Hazard (d1_canals_09): When fleeing from the second Hunter-Chopper while driving through large cement pipes. 	1:45
 	 	Hazardous Environments (short version)	"A Red Letter Day" (d1_trainstation_05): When Gordon acquires the HEV suit in Dr. Kleiner's lab. 	0:35
 	 	Biozeminade Fragment 	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. Contains a sample from Zero-G's Cuckooland: Unhinged sample library. This track is a sped-up version of Alien Shock from Half-Life.	0:32
 	 	Triple Entanglement 	Anticitizen One (d3_c17_08): Upon entering the Zombie infested sewers near the end of the chapter. 	1:32
 	 	Something Secret Steers Us 	Sandtraps (d2_coast_10): At Lighthouse Point during the Dropship attack. 	2:03
 	 	Tau-9 	Highway 17 (d2_coast_04): When using the magnetic crane.This track originally appeared in Half-Life as Drums and Riffs. 	2:04
 	 	 	 	1:56
 	 	Escape Array 	Black Mesa East (d1_eli_01): At the start of the level, right after the loading screen. 	1:27
 	 	Dirac Shore 	 	1:25
 	 	Singularity 	Entanglement (d2_prison_08): When viewing the Nova Prospekt teleport. 	1:19
 	 	Tracking Device (OST mix) 	Contains a sample from Zero-G's Trance Formation sample library. This track is a remix of "Credits/Closing Theme" from Half-Life. This version only appears on the soundtrack CD. 	1:03
 	 	Xen Relay 	 	0:38
 	 	Apprehensive Short 	Entanglement (d2_prison_06): When Eli's Combine pod opens up at the window with Alyx and the player. 	0:23
 	 	Bass String Short 	Route Kanal (d1_canals_01): When Civil Protection is beating up the couple, right before the player gets the pistol. 	0:09
 	 	Scared Confusion Short 	Sandtraps (d2_coast_11): Right before the Antlion Guard battle outside the Vortigaunt camp. 	0:16
 	 	Dark Piano Short 	Route Kanal (d1_canals_03): When entering the room full of explosive barrels and Manhacks. 	0:17
 	 	Sharp Fear Short 	Water Hazard (d1_canals_13): When the Hunter-Chopper is destroyed.Sandtraps (d2_coast_11): When the Antlion guard emerges outside the Vortigaunt camp. 	0:07
=== Episode One ===
Game Sound Name	Raw File Path	Album Track Title 	Description 	Length
 	 	 	unused - creepy march 	
 	 	Eine Kleiner Elevatormuzik 	Undue Alarm: When looking over the ledge in the Citadel where Alyx comments "I had no idea," before encountering the Stalkers and the Rollermines.	1:18
 	 	Combine Advisory 	Undue Alarm: When entering the room with the shaft full of Advisor pods. 	1:54
 	 	 	lost coast, church music 	
 	 	Guard Down 	Urban Flight: When Alyx uses the mounted gun after killing the Antlion Guard. (in launch teaser) 	1:39
 	 	Darkness at Noon 	Lowlife: When first entering the vents where Alyx comments on being "blind as a bat." 	0:56
 	 	 	unused - slow march, elevator/train ride or reveal 	
 	 	Infraradiant 	Direct Intervention: When entering the Citadel Core. 	4:38
 	 	Disrupted Original 	Lowlife: During the first large fight with Zombines in the tunnels. 	1:18
 	 	Self Destruction 	Lowlife: After Alyx says "here comes trouble" at the start of the zombie battle. 	2:00
 	 	What Kind of Hospital Is This	Urban Flight: When Alyx gets a shotgun before entering the hall of zombies. (in launch teaser) 	3:05
 	 	Decay Mode 	Lowlife: After the lights by the elevator go out and Alyx comments on the sparking wire. 	3:07
 	 	 	unused - ambient, mystery, exploration, resolution 	2:04
 	 	 	unused - house, upbeat (maybe for travel/motion) 	
 	 	 	unused - ambient + bongo groove, wasteland caves 	
 	 	 	unused - ambient, nature, wasteland, positive 	
 	 	Penultimatum 	Exit 17: When the Strider first appears. 	2:50
 	 	 	 	
=== Episode Two ===
Game Sound Name	Raw File Path	Album Track Title 	Description 	Length
 	 	Vortal Combat 	This Vortal Coil: During the final wave of the Antlion attack, in which the vortigaunts assist Gordon Freeman in the fight.	3:15
 	 	Sector Sweep 	Riding Shotgun: During the Combine ambush directly after the meeting with the Barn Advisor. 	2:46
 	 	Last Legs 	Our Mutual Fiend: When fighting the second wave of Striders and Hunters during the attack on the missile silo. 	2:07
 	 	Abandoned In Place 	Our Mutual Fiend: During the Combine invasion of the White Forest Base, during the mission to close the second silo. 	2:47
 	 	Inhuman Frequency 	This Vortal Coil: During the G-Man sequence, when the G-Man talks to Gordon as the Vortigaunts attempt to heal Alyx. 	1:50
 	 	Nectarium 	This Vortal Coil: When the Lone Vort finds the larval extract. 	1:47
 	 	Extinction Event Horizon	To The White Forest: The very beginning of the chapter, as Gordon is climbing out of the train wreck. 	2:04
 	 	No One Rides For Free 	Under the Radar: When first driving away from the junkyard after destroying the Autogun. 	1:02
 	 	Dark Interval 	T-Minus One: Starts during the final scene and continues over the credits. 	1:35
 	 	Crawl Yard 	Freeman Pontifex: Near one of the radioactive lakes. 	1:14
 	 	Hunting Party 	Riding Shotgun: During the Hunter ambush. 	3:30
 	 	Eon Trap 	Under the Radar: During the ambush at the White Forest Inn. 	3:14
== External Links ==
* on the Combine Overwiki - Includes more in-depth track descriptions for Half-Life 2, as well as YouTube embeds of the tracks
* on the Combine Overwiki - Includes more in-depth track descriptions for Half-Life 2: Episode One, as well as YouTube embeds of the tracks
* on the Combine Overwiki - Includes more in-depth track descriptions for Half-Life 2: Episode Two, as well as YouTube embeds of the tracks
Category:Half-Life 2
Category:Sound System
Category:Lists