Undertale AU Ideas Wiki
Welcome to the sister wiki of the biggest encyclopedia on Undertale and Deltarune AUs. This wiki hosts the pages and affiliated material that the Undertale AU and Undertale OC Wikis do not; such as non-existent AUs, single-AU character pages, item pages, and so on.

There are currently 90 articles, 73 files, and 6 active users on the site!

Even though this wiki has very, very few standards, there are still standards. Please be sure to thoroughly read the Rules and Guidelines and the Policy of the Wiki before contributing to our 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
  • -- ShipsGo to Project:Ships
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

This wiki is still InDev. Please keep this in mind as you look around.

Please also refrain from adding categories to pages, as there's a specific type of categorization to come, so please be patient.

Official Affiliated Pages
Undertale AU Wiki

Undertale OC Wiki
Undertale Ideas Wiki - You are here


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