Sprunki is a fan-made music game inspired by Incredibox, where players mix loops from a cast of colourful characters, including Simon. In horror mode those characters are redesigned as corrupted, frightening versions, and their sounds change to match. Clips from that mode are widely shared in gameplay videos, fan edits and short-form posts, where the darker Simon sound has become a shorthand for a scene turning sinister. It remains popular because Sprunki horror content keeps circulating, and the sound instantly signals that shift.