Undertaleaus Stories

What if someone is reborn as Error? What if they aren't so bad? What if they're suffering in silence and keeping their job a secret for fear of hate? How will Ink react...

⪼A life where our beloved [Reader/REDACTED] died a very.. 'Fun' death. ⪼upon realizing their death, they'd realize that they reincarnated into error sans, a character th...

What if someone from our world became dream on the first day they were made and were determined to not lose their brother to corruption like the original dream did in th...

TW: Swearing and slight gore Y/N reincarnates in the anti-void as a Voice... Will he befriend error or will they make them hate their guts? And will they meet other peop...

(As far as I know, no one has made a story about naturetale like this so..and the only reason why I writing one like this is because of fatal error part 5? Or part 4, go...

A 'random' teenager dies all of a sudden from what seems to be a gun, they aren't your usual teenager, it was someone more then that. Someone that nobody wanted to die...

adopted story. original by @Mijunaa :3 - The afterlife of a dead human that reincarnated into a Killer!Sans variant. The facade of the new owner of the body, could he k...

She didn't really expected this, just a few seconds ago she was protecting her kids and now she's staring at a bunch of skeletons and a human with two of them looking a...

Note to self: Never make jokes about getting reincarnated into a video game character because it'll actually happen. Welp too late to go back now, considering I'm alread...

A 31 year old female died and reincarnated as Classic Sans. The multiverse is fighting.Will she join the fight does she know the truth?

Frisk was a good human. She did her best to release everyone to the surface! And even now, it is her birthday today And Frisk is quite excited about it! Very...Very...Ex...

After being trapped in a research facility for their entire life, babybones Cookie finally finds themself in the ocean, free to explore the place that should always have...

This doesn't 100% follow the original Xtale story even before the babifacation of Gaster. When a pure yet genius soul dies at the same moment one of Xtale Gaster's over...

Matt was a regular person who was a big fan of Undertale and its fangames. One day, he dies because of a person accidently knocking him off a mountain while he was hikin...

edit(Now that I think about it a bunch of random crap is gonna happen) Error (the FGOD) is wounded badly in a fight between him and ink. and randomly portals to the or...

What if someone pushed reaper into the void while he was visiting outertale? Well nothings going to be the same since reapers no longer in the same multiverse... (Everyt...

⪼Beaten up and betrayed, {Y/N} dies an unfair death because of their backstabbing best friend. ≫Realizing they have been reincarnated, {Y/N} searches for a new purpose i...

What if..someone was transported as lust sans.. and also weren't them at the same time? (Different happening..different beginnings...etc

Jaune Arc this man always wanted to be a hero like his ancestors but fate decided to mock the blond knight Jaune saved Cardin Winchester from the Ursa Major but Cardin d...

I have an Idea for an Undertale AU. And apparently, it's a good idea? So here, have a book. --- Long ago, two races ruled the earth. But when a plague of corruption swep...