Sans Fight Simulator:
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Bad Time Simulator: Classic Sans Fight | Undertale's Iconic Duel

Released:May 13, 2025

Sans Battles

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.

Bad Time Simulator: Classic Sans Fight Game Screenshot

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.

How to Survive the Classic Sans Fight

Outmaneuver Sans' deadly attacks with these controls and tips:

Controls & Basic Mechanics

Use arrow keys to move your SOUL, Z to advance dialogue, and prepare for Blue Soul mode where gravity affects movement (use up/down arrows to jump).

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.