The Gaster Blaster comes from Undertale, the 2015 indie role-playing game by Toby Fox, where skull-shaped blasters fire powerful beams during Sans's famously difficult boss battle. Fans clipped the beam sound and shared it across YouTube, TikTok and soundboard sites, turning a moment from a single fight into a shorthand for an overpowered attack. It remains popular because Undertale's community still makes edits, animations and memes, and the blast instantly signals that something unstoppable is about to happen.