Undyne is a major character in Undertale, the 2015 role-playing game by Toby Fox, and Undyne the Undying is her stronger form encountered on the game's genocide route, where she makes a final stand against the player. Short clips from that battle have circulated for years in Undertale edits, speedrun highlights and meme videos, often used to signal determination turning into defeat. Because the character and that fight remain well known among Undertale fans, even a fraction-of-a-second sound can instantly evoke the tension of the encounter.