Credits / Closing Theme (Tracking Device)
Kelly Bailey
Klaxon Beat
Kelly Bailey
Nuclear Mission Jam (Something Secret Steers Us)
Kelly Bailey
Valve Theme [Long Version] (Hazardous Environments)
Kelly Bailey
Vague Voices (Black Mesa Inbound)
Kelly Bailey
Klaxon Beat
Valve
有一种悲伤
Zkaaai
Sector Sweep
Kelly Bailey
Combine Harvester
Kelly Bailey
Tracking Device
Kelly Bailey
Echoes of a Resonance Cascade
Kelly Bailey
Vortal Combat
Kelly Bailey
CP Violation
Kelly Bailey
Apprehension and Evasion
Kelly Bailey
You're Not Supposed to Be Here
Kelly Bailey
生不如死
半条命
Adrenaline Horror
Kelly Bailey
Last Legs
Kelly Bailey
隔壁老樊-我曾 DJ版(Remix)
半条命
Diabolical Adrenaline Guitar (Lambda Core)
Kelly Bailey
Triple Entanglement
Kelly Bailey
Military Precision
Kelly Bailey
Singularity
Kelly Bailey
写给山鬼听
半条命
Lab Practicum
Kelly Bailey
群星-执着（弹鼓版）（另类人 / 林柯轩 remix）
半条命, 林柯轩
半条命
lolan
Hazardous Enviroments
Kelly Bailey
Penultimatum
Kelly Bailey
Triage at Dawn
Valve