

Sans Fight Simulator
2.4(15)
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Bad Time Simulator: Classic Sans Fight | Undertale's Iconic Duel
Game Overview
Released:May 13, 2025
🎮 Basic Controls: Use right arrow key to move Frisk to Sans and start dialogue, Z to continue dialogue, arrow keys to move your SOUL during battle
🔵 Blue Soul Mode: Up/down arrows to jump when gravity affects movement
🎯 Combat Strategy: Dodge bone patterns and Gaster Blasters while managing Karmic Retribution (HP drains over time). Use Megalovania's beat to time your movements and watch Sans' eyes to predict Blaster angles.
Face the skeleton judge in a pixel-perfect showdown! This 2016 classic recreates Undertale's grueling Sans battle with bone-dodging chaos, Gaster Blasters, and Megalovania's pulse. Test your reflexes in this fan-made masterpiece that defined hardmode duels.
Why This Sans Fight Defines Classic
Created by harrypotter3710, this simulator captures the raw intensity that hooked fans worldwide:
True-to-Form Showdown
Dodge bone barrages and Gaster Blaster beams while Sans' fourth-wall-breaking taunts hit as hard as his attacks. With Megalovania driving the pace, every move tests your timing in a retro pixel arena, where 20 seconds feels like a triumph.

A Fan-Made Milestone
This battle simulator set the standard for future recreations:
- •Spot-On Attacks: Bone patterns and Blasters match Undertale's rhythm
- •Iconic Dialogue: Sans' witty, chilling lines unfold with every Z press
- •Blue Soul Challenge: Gravity-bound phases demand precise jumps
- •Karmic Retribution: HP drains over time, just like the original
As one of the earliest fan recreations, this simulator delivers the authentic experience fans crave, perfect for newcomers and veterans chasing that classic rush.

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