Gaster Blasters first appeared in Toby Fox's Undertale, released in 2015, as the signature attack of Sans during the Genocide route boss fight. The floating skull cannons are named for the mysterious W. D. Gaster, a character referenced only in hidden lore. The charging whine became widely reused outside the game as fans made battle recreations, animations and memes, isolating the charge from the blast itself. Its brevity and rising pitch made it a standard shorthand online for an anime-style energy weapon powering up before firing.
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The Gaster Blaster charging sound from Undertale, a rising energy hum before the skull cannon fires, used for power-up and attack teases in edits.
This is the short charge-up whine that plays just before a Gaster Blaster fires in Undertale, named after W. D. Gaster and used by Sans in his boss fight. It starts as a low electronic hum and climbs quickly in pitch and intensity over less than a second, like energy being pulled into the floating skull cannon. The rising tone creates instant tension because players know a powerful beam is about to follow. In edits it works as a pure anticipation cue, signalling that something overpowered is loading and about to be unleashed.
