Deltarune is Toby Fox's episodic role-playing game, first released in 2018 as a follow-up in spirit to Undertale, with later chapters expanding its cast and story. Short voice-like reactions and text-box sounds from the game are widely clipped by fans because they are instantly recognisable even out of context. This gasp circulated on soundboards and in fan edits as a standalone reaction, separate from gameplay, and stuck because its length makes it easy to reuse. It remains popular with editors who need a clear surprise cue that fans immediately associate with Deltarune.