Nuclear Mission Jam (Something Secret Steers Us)
Kelly Bailey
Tracking Device
Kelly Bailey
生不如死
半条命
Klaxon Beat
Kelly Bailey
听什么都像唱自己
半条命
Triage at Dawn
Kelly Bailey
Adrenaline Horror
Kelly Bailey
Klaxon Beat
Valve
受伤的翅膀
半条命
群星-执着（弹鼓版）（另类人 / 林柯轩 remix）
半条命, 林柯轩
写给山鬼听
半条命
痛不欲生啊
半条命
你我最后终是过客
半条命
自闭症
半条命
Credits / Closing Theme (Tracking Device)
Kelly Bailey
Valve Theme [Long Version] (Hazardous Environments)
Kelly Bailey
Triage at Dawn
Valve
Diabolical Adrenaline Guitar (Lambda Core)
Kelly Bailey
Vortal Combat
Kelly Bailey
分手何必说快乐
半条命
最后一次的分离(cover)
半条命
Lambda Core
Kelly Bailey
隔壁老樊-我曾 DJ版（陈壹阳 remix）
半条命
You're Not Supposed to Be Here
Kelly Bailey
Neutrino Trap
Kelly Bailey
半条命
静静
Sector Sweep
Kelly Bailey
Black Mesa Inbound
Kelly Bailey
Something Secret Steers Us
Kelly Bailey
Brane Scan
Kelly Bailey