The Gaster Blaster comes from Undertale, the 2015 role-playing game by Toby Fox, where the skull-shaped blasters are used by Sans during his final boss battle. Their distinctive blast became instantly recognisable to players who reached that fight, and clips of the encounter spread widely through Let's Plays and fan animations. Since then, the sound has lived on outside the game as shorthand for an overwhelming, almost unfair attack, reused in Undertale fan works, gaming edits and memes whenever a character needs to feel unstoppable.