Undertale AU Wiki

Welcome to the Undertale AU Wiki, the main place for documenting Undertale's AUs. If you wish to contribute, just know that it is REQUIRED for you to read the Rules and Guidelines and the Policy of the Wiki BEFORE doing so.

As this is an AU Wiki, this wiki is NOT meant for characters. The Undertale OC Wiki exists for those. This Wiki is also not meant for AUs that do not have presence anywhere else, and those should be put on the Undertale AU Ideas Wiki.

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Undertale AU Wiki
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Intro

Backstory AUs are AUs that take place before the events of Undertale or, in the case of AUs of AUs, before the story of the base-AU, but don't change anything that would happen in Undertale/the base-AU.

The timeframe of a Backstory AU can proceed to continue throughout Undertale's or the base AU's events, as long as it does not conflict with anything that happens in the story.

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