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

There are currently 398 articles, 9,665 files, and -1 active users on the site!

Just know that it is REQUIRED for you to read the Rules and Guidelines and the Policy of the Wiki BEFORE contributing to our Wiki.
If you have a question about certain things here on the wiki, visit the Questions and Answers Forum Board and ask there. Be sure to read through the FAQ first, as your question might already be answered there.
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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".


Featured Article
Undertale Rho
Undertale Rho

Undertale Rho is an Undertale Alternate Universe created by Ioannis Argyris that serves greatly in expanding the universe of Undertale, presented primarily in the form of novels and short stories. At present, the entirety of the universe of Undertale Rho (taken short-hand to be Universe Rho) is shrouded in mystery. While still holding close to the original story told in Undertale, Undertale Rho is not beholden to it, and some elements from Undertale are rewritten entirely. (more...)


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IMPORTANT
Final check is initiated, please do not remove the Checks Out template. Wait for an Admin to come by and check off your page. Removal of the {{Checks Out}} template by unauthorized users will result in an immediate banning of the violating user lasting 3+ months. This is your only warning. Thank you for your co-operation.


Poll
What is your favorite AU? Remember to read the entire list before voting.
 
5
 
5
 
2
 
2
 
10
 
2
 
7
 
1
 
4
 
1
 
3
 
3
 
1
 
0
 
3
 
20
 
4
 
8
 
0
 
1
 
16
 

The poll was created at 01:03 on March 13, 2019, and so far 98 people voted.


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