Who's There comes from the original soundtrack to Persona 4, the role-playing game released by Atlus in 2008, where atmospheric tracks underscore the murder mystery in the town of Inaba. Its sparse piano style made it easy to lift as a standalone sting, and short clips later circulated on soundboards for edits needing sudden suspense without a full horror score. The Persona 4 soundtrack remains widely associated with investigation scenes and eerie quiet, which is why this brief excerpt is still reused whenever creators want instant tension.