* = not present on the Half-Life 2 Original Soundtrack CD.
On March 16, 2020, Valve partnered with independent record label Ipecac Recordings to release several of the Half-Life series soundtracks on streaming services. On September 24, 2014, the soundtrack was made available as free DLC to all owners of the game on Steam. 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. Using an appropriate program, it is possible to extract all audio tracks heard in-game from the hl2_sound_misc_dir.vpk archive file. Although the CD contains several exclusive tracks, it does not include all of the music heard in the game. The limited edition Half-Life 2 'Gold' package included, among other exclusive extras, a CD soundtrack. Most, if not all, of the tracks were named by Marc Laidlaw. It is an amalgamation of newly-composed music and several cues from Bailey's previous work on Half-Life. The Half-Life 2 soundtrack was composed by Kelly Bailey.
