Sprunki began in 2024 as a fan made mod of the music game Incredibox, where players drag icons onto characters like Brud to build looping tracks. The mod added a hidden horror mode that warps the bright cast into darker versions, and clips of those transformations spread quickly across YouTube and TikTok. Sprunki Retake is a popular fan remake that refines the art and audio, including Brud's unsettling horror loop. That short transformation sound became a reusable cue far beyond gameplay, reused in edits whenever a cute scene needs to turn sinister.