Half-Life 2 Soundtrack

Kelly Bailey composed numerous short pieces of original incidental music that are interspersed throughout Half-Life 2. Also, several tracks from the Half-Life soundtrack were re-titled and carried over, some of them remixed. Energetic techno tracks tend to back significant battles. Atmospheric synthesizer pieces enhance key plot and exploration moments and reinforce feelings of adventure, isolation, or melancholy in the player.

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 released with the game. Using an appropriate program, it is possible to extract all audio tracks heard in-game from the "source sounds.gcf" archive file. Tracks 44–56 in the list below were not released on the CD and can be obtained by this method. The soundtrack (save the CD version of tracks 1 and 34) was also included in the game directory of both the full and demo Audiosurf releases on Steam.