Hurray! Someone else was making the soundtrack for FPS! I appreciate it)
Injection + Roaming The Halls is interesting... ambient breakbeat? It's curious ....
The Medical Ritual is ambient, which tells me: "Dude, relax and enjoy peace of mind while you can" (How do you even do this?!)
External Intervention (battle Loop) - Oh... that BASS - IS FIRE!
Disintegration (end Credits) - Sounds like... A soothing bit. Heh)
Good and creative work! I liked it)
P.S. I love the atmosphere of Quake)