Sans (Undertale)

Sans delivers the hardest fight in Undertale during the genocide route, attacking during menu navigation and dodging your attacks—a first in RPG history that subverts turn-based conventions. His opening monologue cuts through the player’s completionist mindset with a raw 1,200-word lecture on consequence, and the fight requires frame-perfect dodges that kill 99% of first-time players. This design turns completionists into villains, proving that a low-resolution skeleton can generate more moral weight than photo-realistic epics.