Hard Mode sans fight - TurboWarp

TurboWarp is a Scratch mod with a compiler to run projects faster, dark mode for your eyes, a bunch of addons to improve the editor, and more.

Amzter1234 on Scratch

Jaypin88 - Speedrun

Undertale Sans fight hard mode

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88 handpicked Scratch games of Undertale

Best Free Undertale Games - Game Jolt

SupaDud3_ on Scratch

Hard mode sans Fight - TurboWarp

Undertale Simulator Papyrus