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

There are currently 2,400 pages to the site, you can add more!

Check out our sister Wikis, the Undertale OC Wiki and Undertale AU OCs Wiki, as well as the UTAU Wiki RP Wiki, for doing your roleplays.

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 AUs (Alternate Universes) are what-if scenarios of the role-playing game Undertale by Toby Fox.


Latest activity


Poll
Which is your favorite AU?
 
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740
 

The poll was created at 03:51 on January 20, 2017, and so far 1839 people voted.


Affiliated Wikis
Undertale Wiki

This Wiki supports the Undertale wiki

Underfell Wiki

This Wiki supports the Underfell wiki

Underswap Wiki

This Wiki supports the Underswap wiki

Storyshift Wiki

This Wiki supports the Storyshift wiki

Storyswap

This Wiki supports the Storyswap wiki

Utau

This Wiki supports the UTAUWikiTale wiki


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