Highway 17 and Sandtraps Ambience - Half-Life 2 Ambience
Creepy Ravenholm Ambience
Route Kanal and Water Hazard Ambience - Half-Life 2 Video Game Ambience
City 17 Ambience from Half-Life 2
The sourceruns team Still Alive cover
I really like Opfor's soundtrack, I will admit it is far from the best one in the series. But, it's not that bad. Thought I makes me wish Blue Shift had it's own Soundtrack. If BS did, world peace would probably have happened already.
Medley of the Half-Life 1 soundtrack partially done with the same sample libraries Kelly Bailey used.
Hazardous Remixes: Chapter II
Neon Green Chambers: Chapter II