Category:Aus

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

AU categories are used to tell AUs apart.

Swap
Some or all of the canon Undertale characters swap roles and/or personalities with or shift into the roles of the other canon Undertale characters.

No new characters are added, and the story is mostly the same.

Crossovers
Two different Shows/Games/Aus Combined the make a whole new story. example : Dc vs Marvel

Backround Change
AUs that change/focus on the background of a character/characters of the story.

Character-centered
AUs that are focused on a particular set of characters. These include headcanons, extensions, and flat out new ideas.

AU Tones
The tone of AUs.

Serious
AUs that, as opposed to Comedic AUs, actually hold a serious story and such. Just because an AU has a serious tone does not mean that it must be serious all the time, just most of the time .Comedic

Fell
AUs that feature horrible, evil, and/or murderous Monsters.

Horror
Warning: Some of these AUs contain themes that may be disturbing to some viewers.

AUs with the goal of creating something scary, insane, or disturbing. Some AUs that follow the genocide route are also found here, but not all are geno-route-only. Some possible themes include suicide, drug use, alcohol use, depression, death, gore, insanity, disfigurement, pain, etc. Horror can also include Terror, and effects on psychology. This could include things like dystopias and the like.

Comedy
AUs that opposed to Serious Aus, are just full of jokes and humor.

Aus In between
These are Aus that fall in between 2 or more categories. example ; Horrorfell / Axetale