Gaster Blasters first appeared in Undertale, the 2015 role-playing game by Toby Fox, as skull-like weapons used by Sans during his famously difficult boss battle. Their name connects them to W. D. Gaster, a mysterious scientist figure in the game's lore, and players soon associated the weapons with sudden, overwhelming attacks. Clips of the fight spread across video platforms, where editors lifted the growling blast for their own videos. It remains popular because Undertale fans instantly recognise the sound and its link to one of gaming's most memorable encounters.