Five Nights at Sonic's, often shortened to FNaS, is a fan-made horror series that reimagines Five Nights at Freddy's with Sonic characters in the animatronic roles. The third game includes rare screens, brief hidden images that appear by chance instead of the usual view, rewarding players who replay often. Their dedicated sound became a recognisable cue among fans sharing clips and secrets online. Players and editors still use it to mark an easter egg moment, a hidden detail, or an unexpected horror twist in fan videos.