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
Undertale AU Wiki
Undertale AU Wiki
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Theme Overhaul

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Theme Overhaul AUs are AUs that completely overhaul the general theme or "feel" of Undertale or, in the case of AUs of AUs, the base-AU. This can either be simply aesthetically, such as Outertale, or alter the characters' personalities, such as Underfell. The base plot is kept mostly unaltered.

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