|Undertale AU Wiki|
|Welcome to the biggest encyclopedia on Undertale and Deltarune AUs.
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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".
Inverted Fate is an Undertale AU taking place after a failed True Pacifist run. Asriel won the final battle and started to reset time, but lost control of his powers, resulting in the six main characters or "lost souls" swapping places but not personalities. This ends up creating a very different Underground.(more...)
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