This is a dark suspense atmosphere soundtrack featuring “psychological warfare” (Dark Ambient / Tension Builder). It chose a deep, torturous emotional pavement. The music spreads out in a bottomless low-frequency Drone, accompanied by extremely dull bass rhythms that seem to knock on the heart, and tiny, weird sound effects that swim around the edge of the sound field. It has no clear melody direction, only the fermenting sense of oppression, which perfectly simulates the psychological state of people in extreme fear and unknown environment.