Pure Source Engine dread turned up to eleven. Nightmare House 2's soundtrack backs one of the best Half-Life 2 horror mods ever made, and it knows exactly when to hit you. "The Nurse" is this suffocating ambient piece that makes you want to pause the game and check behind you.
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"Pitch Black" lives up to its name. Then "Boss Battle" suddenly throws real intensity at you after thirty minutes of creeping tension. Some tracks are barely music, just frequencies and static designed to make your skin crawl.
"Romero's Lab" into "Emily" into "The Core" is a stretch that doesn't let you breathe. If you survived the mod, the soundtrack alone will put you right back in that hospital.