Undertale AU Collecter

3.9(12)

Undertale

Bad Time Simulator

Undertale Sans Fight

Endless Sans

Sans Fight Simulator

Mouse Control Bad Time Simulator

Gaster Fight

Bad Time Trio Simulator OG 2 Player

Swift Bad Time Trio

Undertale Last Breath

Lucas Battle

Sir Kain Battle

Swap Time Trio

Bad Time Simulator Horrortale

Horrortale Sans Fight

Inktale Sans 2-Player Battle

Underfell Sans Fight

Friday Night Funkin vs Sans

AU Trio Fight

Super Mario Bad Time Duo

Deltarune

Jevil Fight

Berdly Fight

Queen Fight

Jevil Fight 2-Player

Undertale AU Collecter | Pick Your Poison

Released:August 26, 2025

Undertale Alternate universe

Arrow keys to navigate, Z to select and fight, X to go back.

Mouse click to select your Sans and Hard mode.

Undertale AU Collecter - Selection screen with multiple Sans variants and difficulty options

Browse through a rogue's gallery of Sans variants. Each one brings their own brand of chaos - pick your fighter, set the difficulty, and see which version breaks you first.

What's This All About?

Think of it as a Sans battle buffet - you get to sample different flavors of pain before committing to the full meal.

The Collection

Instead of diving blind into random Sans fights, you get a preview of what each AU variant brings to the table. Some throw bones in patterns you've never seen, others mess with gravity, and a few just want to watch the world burn. It's like having a menu at a restaurant where every dish is designed to kill you, but at least you know what you're ordering.

Pick Your Pain Level

Not all Sans variants are created equal, and neither are players. The difficulty system lets you choose between getting your feet wet or diving straight into the deep end:

•Each AU has its own attack signature - no two Sans variants fight the same way
•Normal mode for learning the ropes, Hard mode for when you want to suffer
•Preview each variant's fighting style before committing to battle
•Switch between difficulty settings to find your comfort zone
•Every AU brings something new to the table

AU selection screen showing different Sans variants and difficulty options

Comments

Time to Choose

Start Picking

Undertale AU Collecter

Undertale AU Collecter | Pick Your Poison

Game Overview

What's This All About?

Time to Choose