Eternal Darkness: Sanity's Requiem is a survival horror game released for the Nintendo GameCube in 2002, built around a sanity meter that distorts reality as the player's character loses their mind. Its unsettling audio design, credited in this clip to Steve Henifin, became a defining part of that atmosphere and a favourite reference for horror fans. As gameplay clips and retrospectives circulated online, the chime became shorthand for creeping dread, and editors still reuse it today because a few cold notes can unsettle a scene without dialogue or a visual effect.