Claustrophobia defines every moment inside a one-man submarine drifting through a sea of blood. Limited visibility, failing machinery, and long stretches of silence turn routine movement into quiet dread. Progress depends on locating key areas and documenting them, knowing each stop may draw unwanted attention from something moving below the hull.
There are no weapons, no safe zones, and no certainty. The focus stays on observation, navigation, and restraint, letting psychological horror build naturally through isolation and sound. By keeping the experience tightly contained, the tension never resets—only deepens—making each descent feel heavier than the last.