undertale Hard mode ! by betasansofficial on DeviantArt

Insanity!Sans Hard Mode by HailtotheKing107 on DeviantArt

Undertale Hardmode: Wonderful Idea Sans (fanart) by H3X33B on

Undertale [Hard-Mode]: Wonderful Idea (HadePhobia) by finnjake19

HARD-MODE] Insanity Sans Sprite Sheet v2 by slimdaddee on DeviantArt

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Undertale: the slaughter's game over (phase 1) by TheBobGaming on

Hard Mode : Undertale - Sans by JithGaming on DeviantArt

Beta!sans info by betasansofficial on DeviantArt

Hard-Times: An HardMode take by ProbNotEvaN on DeviantArt