Undertale is a 2015 role-playing game by Toby Fox in which the player character's SOUL, shown as a small red heart, is central to combat, choices and the story's emotional stakes. The game's distinctive retro sound design helped its audio spread far beyond the game itself, with fans sharing short clips on soundboards and reusing them in edits, streams and memes. This shattering variation has stayed popular because it is instantly recognisable to players and works outside its original context, turning any sudden loss, betrayal or broken plan into a moment that feels unmistakably Undertale.