Bad Time Simulator

Fight against the notorious skeleton boss in Bad Time Simulator and see how many attempts it takes you to win! Enter the battle, learn his attack patterns, and test your skills to see if you can survive this Sans Fight.

Face Sans in a Relentless Battle

Inspired by the famous Genocide Route encounter in Undertale, Bad Time Simulator recreates Sans Fight in a standalone browser experience. Control a red soul inside a confined battle box while bone attacks, Gaster Blasters, and sudden gravity changes leave little room for mistakes. Sans constantly pressures you with new attack combinations, making each phase a test of movement and pattern recognition.

Dodge Bones and Escape Gaster Blasters

Taking damage can also trigger Karma (KR), which gradually drains your remaining health. Avoiding early hits gives you a better chance of reaching the later stages with enough HP to continue.

Bad Time Simulator Controls

• Arrow Keys / WASD - Move the red soul.
• Up Arrow / W - Jump during Blue Soul sections.
• Z / Enter - Confirm selections and attack.
• X / Shift - Cancel or go back.
• C / Ctrl - Open the menu.
• Fullscreen Icon - Expand the game view when available.

Small, controlled movements help you navigate narrow gaps without drifting into nearby hazards. During Blue Soul sections, pay attention to the attack color: blue bones are safe when you remain completely still, while orange bones require movement.

Unlock a Tougher Test in Bad Time Simulator

Start with Normal Mode to experience the main Sans battle. Once you finish it, the special mode becomes available for players looking for an extra challenge. Depending on the version, additional options may include Practice Mode, Single Attack challenges, Custom Attack creation, and Endless Mode. These features let you focus on difficult patterns, experiment with different sequences, or test your survival skills beyond the standard encounter.

Tips for Beating Sans

• Learn the attack sequence: Repeated attempts help you recognize the gaps, beam angles, and movement changes in each phase.
• Use Practice Mode: If available, replay the attack that gives you the most trouble before returning to the full fight.
• Avoid unnecessary movement: Oversteering can push your soul into a hazard even when a safe path is nearby.
• Watch your remaining HP: KR damage can continue draining health after you take a hit, so preventing damage early matters.
• Stay patient during the final sequence: The battle's closing attacks demand attention even after you have survived its earlier phases.

Ready for Your Bad Time?

Bad Time Simulator turns a legendary Undertale encounter into a focused test of persistence and quick reactions. Every attempt gives you another chance to understand Sans's patterns and push further into the fight. Step into the battle and find out how far your skills can take you! Play another platform-mix action game like this: Apple Knight.