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Several of the tracks are composed of licensed or stock "samples", a notable example being the Methods of Mayhem Industrial Toolkit sample pack by Sony that was used by Kelly Bailey for most of the soundtrack. Due to the sample pack being publicly available (at the time), some of the same samples can often be heard in other games or even movies. An example is the drumbeat sample used in Hard Technology Rock, which can also be heard in the track Crush from the Command & Conquer: Red Alert soundtrack.
|6||00:25||Apprehensive Short |
Notes: Plays in Unforeseen Consequences when seeing the Zombie in the dark room seated in front of a flashing monitor, in Office Complex while exiting the elevator and seeing a live wire blocking the path, in Apprehension when encountering the first Ichthyosaur, and in "Forget About Freeman!" inside the sewers when approaching an Ichthyosaur.
|7||00:10||Bass String Short|
|8||01:35||Hurricane Strings |
Notes: Plays in Office Complex within the freezer area.
|9||01:46||Diabolical Adrenaline Guitar|
|10||01:24||Valve Theme (Extended) |
Notes: Plays in Surface Tension as Gordon crosses the cliffside area.
|13||01:14||Sirens In The Distance |
Notes: Plays in On A Rail when Gordon descends into the tunnels.
|14||02:02||Nuclear Mission Jam|
|15||00:18||Scared Confusion Short|
|16||02:05||Drums and Riffs|
|17||01:42||Hard Technology Rock|
|18||01:57||Steam In The Pipes|
|19||01:26||Electric Guitar Ambiance|
|21||01:22||Military Precision |
Notes: Plays in Residue Processing after meeting up with a security guard.
|23||01:19||Traveling Through Limbo|
|24||01:41||Credits / Closing Theme |
Notes: Plays in Endgame during the credits.
|26||00:19||Dark Piano Short|
|27||00:10||Sharp Fear Short|
Behind the scenes
The tracks Vague Voices, Steam In The Pipes, Traveling Through Limbo, Dimensionless Deepness, and Threatening Short all have the name "
Prospero" in the game files, implying they were originally to be used in one of Valve's canceled games, Prospero.
In several pre-release videos of Half-Life, a different version of Diabolical Adrenaline Guitar can be heard. It was likely changed in Summer 1998, as the old version can be heard in the E3 1998 Gruntfight video but is not present in Half-Life: Day One.
|Soundtracks||Half-Life (Opposing Force • Blue Shift) • Half-Life 2 (Episode One • Episode Two) • Half-Life: Alyx • Portal • Portal 2 • The Orange Box|
|Songs||Cara Mia Addio! • Exile Vilify • GLaDOS' Song • Still Alive • Want You Gone • You Wouldn't Know|
|Composers||Kelly Bailey • Jonathan Coulton • Chris Jensen • Mike Morasky • The National|
|Other||Half-Life: Further Data • Mishaps in the Reactor Chamber|