Sprunki began as a fan-made music game inspired by Incredibox, where players mix looped sounds from colourful characters to build tracks, and Raddy is one of its best-known red characters. Horror Mode reimagines those characters with darker designs and distorted sounds, and clips from that version spread through gameplay videos, edits and memes. Fans use Raddy's horror sound to mark a sudden change in tone, and its short length makes it easy to reuse in short-form videos. Its recognisable character and creepy energy keep it popular with Sprunki players and horror meme creators.