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Undertale AUs are what-if changes to the universe of Undertale.

AU categories are used to differentiate AUs and to avoid confusion between AUs (categories are not AUs themselves).

An AU can fit under multiple categories. Category:AU Types Category:AU Tones== AU Continuities == Category:AU Continuities Category:Medium

Miscellaneous AU Categories

Categories that don't fit in the above categories.

Community Shared

Category:Community Shared

AUs of AUs

Category:AUs of AUs

Parodies

Category:Parodies

Joke AUs

Category:Joke AUs

Outside the Underground

Category:Outside the Underground

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