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IMPORTANT
Because there has been an increase in people removing the Cleanup Template, it seems that I must remind you all that the removal of the Cleanup Template WILL result in the deletion of the page. This has been expressed in the past, so consider this your final warning. DO NOT REMOVE THE CLEANUP TEMPLATE!!!
New To The Wiki?
If you are new it is REQUIRED for you to read the Rules and Guidelines BEFORE contributing to our Wiki. If there is anything you need help with, contact an Admin on this list. As a side note, no user is above the rules, even staff. It will always be assumed that you have read the rules, and any punishment told in the rules will be carried out no matter what.

And if you see something on this site that is yours and you are unhappy with its presence here, please contact Alphasaith with a link to the page that steals from you and a link to the proof of this being your work.
Also, check out this fantastically sarcastic post by WikiP here.


Undertale AU Wiki
Welcome to the biggest encyclopedia on Undertale AUs.

There are currently 890 pages to the site, you can add more!

Check out our sister Wikis! There is the Undertale OC Wiki, as well as the UTAU Wiki RP Wiki, for doing your roleplays. And there is also the UTAU Ideas Wiki, the UTAU Self Insert AUs Wiki, and the Offspring Wiki.

This site contains spoilers for Undertale. if you have not completed the game, you may get spoiled.


  • Alternate UniversesGo to Category:AUs
  • LocationsGo to Category:Locations
  • CharactersGo to Category:Characters
  • ItemsGo to Category:Items
  • MusicGo to Category:Music
  • StoriesGo to Category:Stories
About Undertale AUs
Undertale Alternate Universes, or "AUs", are alterations to the story, world, and or characters of Undertale, be it crossovers, changes in aesthetic, or role-swaps.

"AU" is an umbrella term that includes "ATs".


Latest activity


Poll
What is your favorite AU? Remember to read the entire list before voting.
 
28
 
31
 
6
 
34
 
7
 
1
 
6
 
4
 
7
 
0
 
8
 
2
 
50
 
0
 
11
 
14
 
1
 
4
 
0
 
1
 
2
 
128
 

The poll was created at 04:04 on October 17, 2017, and so far 345 people voted.


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