If you submit an AU and don't have a link, your submission will be deleted.
Want to submit an AU? Click here and read this!
Have a question? It may have been answered, check the FAQ!
Click the titles of categories to see more on the AUs listed below them.
Every single character in Undertale is changed. AUs that only affect some of the characters are not found here, nor are AUs that change only during the time Frisk is within the underground.
Basic Change (<-THIS IS A LINK)
The basic theme of Undertale is changed, flipped, or modified while still remaining in the same basic sto