UnderBattles - AU Fights

KYwoo

Contains ads

About this game

This is a completely free to play fan-made unofficial project based on the original Undertale™ game created by Toby Fox.
All rights, characters, and assets belong to their respective owners.
This game is a fan work that is not affiliated with Toby Fox or the official Undertale team.
For any copyright inquiries or asset removal requests, please contact me directly at [e-mail]. I respect intellectual property and am fully committed to resolving the issues!

There are many battles from different Undertale universes that were made by KYwoo and many other creators.
We can kind of say this game is collection of Undertale fangames!
Have fun everyone!!

Ratings and reviews

It's a super cool game, one of the best Undertale fan apps I have ever played. Some issues I had were the controls not moving where they were supposed to. I put that I wanted them on the right side of the screen, but it ended up on the left anyway, plus it wouldn't let me move it to the other side in the customization menu. That's really the only problem I had. I can't wait for another update and more battles! Maybe we will get OG Swaptale Papyrus or a normal Sans fight.

It is nice, but I do have a few suggestions. First it would be nice to have the ability to change the main menu theme and song, same with the battles. Also, can you add Forced Smile but remade, because the original one is incomplete? Anyways, this game is still really good.

Good but an ad EVERY time you die or go into battle is kinda extreme

What’s new

UnderBattlest REMASTERED - Will be released at 2026-2027!