Album was composed by Kelly Bailey and was released on November 16, 2004. Soundtrack consists of tracks with duration over more than hour. Album was released by Valve Software.

Sounds like Ambient - that's what we can say about this album.

CD 1

1	Hazardous Environments	01:24
2	CP Violation	01:45
3	The Innsbruck Experiment	01:07
4	Brane Scan	01:40
5	Dark Energy	01:32
6	Requiem for Ravenholm	00:33
7	Pulse Phase	01:09
8	Ravenholm Reprise	00:52
9	Probably Not A Problem	01:26
10	Calabi-Yau Model	01:46
11	Slow Light	00:44
12	Apprehension and Evasion	02:17
13	Hunter Down	00:15
14	Our Resurrected Teleport	01:11
15	Miscount Detected	00:48
16	Headhumper	00:08
17	Triage at Dawn	00:45
18	Combine Harvester	01:25
19	Lab Practicum	02:54
20	Nova Prospekt	01:57
21	Broken Symmetry	01:03
22	LG Orbifold	02:52
23	Kaon	01:11
24	You're Not Supposed to Be Here	02:41
25	Suppression Field	00:55
26	Hard Fought	01:15
27	Particle Ghost	01:40
28	Shadows Fore and Aft	01:26
29	Neutrino Trap	01:35
30	Zero Point Energy Field	01:41
31	Echoes of a Resonance Cascade	01:38
32	Black Mesa Inbound	02:13
33	Xen Relay	00:39
34	Tracking Device	01:03
35	Singularity	01:19
36	Dirac Shore	01:26
37	Escape Array	01:26
38	Negative Pressure	01:57
39	Tau-9	02:05
40	Something Secret Steers Us	02:02
41	Triple Entanglement	01:32
42	Biozeminade Fragment	00:32
43	Lambda Core	01:44