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This is the soundtrack for Half-Life: Episode 2. Every song described here can be found in the Episode 2 GCF, in the folder: ep2>sound>music.
 "No One Rides For Free"
A fairly quiet, slightly eerie song.
Location played: When first driving away from the junkyard after destroying the Autogun.
 "Dark Interval"
Presented in the game files as "VLVX_song3". The song has a slow moaning quality to it, with a sense of imposing darkness. In the middle, the song seems to brighten some but fades out quickly.
 "Crawl Yard"
Has an industrial feel to it, with sounds similar to clanks and steam hissing. Mostly ambient.
Location played: Freeman Pontifex: Near one of the radioactive lakes.
An odd, echo-filled song, with rain-like sounds later on.
Location played: When the Victory Mine Vortigaunt finds the larval extract.
 "Extinction Event Horizon"
A synth-filled track, mostly ambient.
Location played: The very beginning of To The White Forest, as Gordon is climing out of the train wreck.
 "Vortal Combat"
- A fast, upbeat and dramatic song that accompanies the final wave of the antlion attack with the help of the vortigaunts. Instruments heard in it include electric guitars, drum beats, and techno samples.
- The title is a pun on both Vortigaunts and Mortal Kombat.
- It is named VLVX_song22 in episode 2's GCF.
- This Vortal Coil: 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.
 "Sector Sweep"
Presented in the game files as "VLVX_song23". Another techno-rock song, with a small section from Shu'ulathoi around the middle.
- During the Combine ambush directly after the meeting with the Barn Advisor.
- On the console version of The Orange Box, this song is played in the main menu for the Episode 2 screen.
- A fairly quiet, but dark and eerie song.
- Its name is a reference to the Vortigaunt name (and perhaps the true name) for the Combine Advisor.
Comments: The song seems to have elements from Procedural Jiggle Bone from the Portal Soundtrack.
 "Last Legs"
Presented in the game files as "VLVX_song24". A tense, rock song.
Location played: Our Mutual Friend: When fighting the second wave of Striders and Hunters during the attack on the missile silo.
 "Abandoned In Place"
- Presented in the game files as "VLVX_song25".
- Mostly a techno song, with a prominent percussion beat. Seems suiting to an invasion attempt.
- During the Combine invasion of the White Forest Base, during the mission to close the second silo.
 "Inhuman Frequency"
- A dark brooding, industrial track.
 "Hunting Party"
- A techno-rock song, suiting a large battle.
- Features a heavy use of electric guitar, as well as the hi-hat.
- Riding Shotgun: During the Hunter ambush.
 "Eon Trap"
- A quiet techno song.
- Begins slowly, like an ambient track - however, soon becomes an action track (in tandem with the increasing force used by the Combine).