Five Nights at Freddy's 3, released in 2015, introduced hidden 8-bit minigames that revealed backstory for the series' haunted animatronics, including Bonnie, the rabbit character. The soft music box melody heard when entering one of those minigames became known online as Bonnie's Lullaby, shared through gameplay clips, lore explanations and horror edits. Unlike the sudden FNAF jumpscare scream, this tune creates dread slowly, which is why creators still use it for nostalgic, unsettling FNAF content years later.