Undertale Stories

Nightmare. King of Negativity. Leader of the Nightmare Gang. He has a lot of scary titles, but he had to start somewhere, didn't he? Horror. Cannibal. Idiot with half a...

What if sans the funny skeleton was transported to Re:Zero? this fanfic answers that question, what will Sans do? how will he adapt to this new world? We'll just have to...

#1 of 61.7k tagged with Undertale 12/06/24 After drowning as a human, Ashe reawakens as a DustTale variant of Sans. With his ghost Papy helping keep him from falling int...

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...

At a genocide run Sans unexpectedly wins against ¿Chara? and something strange occurred, the timeline was thrown into chaos. As a result of this chaos, Sans unknowingly...

You didn't have a bucket list or anything, but you wished you could've at least read a few more fanfics or done literally anything fun before dying. Oh well, at least yo...

⪼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...

⪼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...

The Universe is vast. And if there is anything confusing that having two of yourself, it is having a vast plethora of others similar to yourself, that have the same name...

What if someone from our world died knowing a lot from the undertale and their multiverse/underverse? What if that person also knew about the balance and didn't creat to...

You were always put in second place due to your sister being favored over you. No matter what you did it always seemed that you both were competing against each other. Y...

After dying in the hospital due to complications in surgery, an Undertale fan finds themselves sitting in Asgore's throne room. Where they have no idea where they are in...

What if there was a multiverse where Error and Ink were friends? What if the voices were the creators? What if they went to the Fgod multiverse because the voices were b...

Ok...but what if I told you that I died and reincarnated as my super favorite sans?? The Fgod Error sans. But the problem for me is not that, but that I love to flirt...

your name is Y/N. you are a lamia bitty. you lived in an inclosure in a pet store. one day a monster skeleton walks in and sees you hanging in your inclosure on a fake t...

Forced god of destruction. one of if not the most merciful monster in the multiverse. misunderstood hero. these were all words that described Error but did anyone know a...

This Au start with a skeleton who has a special hidden magic that no other monsters in his Au have ever seen he named himself as "Sans" but in other sanses fro...

Error gets a small break due to Ink not creating for a day or too. but on the other hand, Ink has noticed something. he noticed that when he stopped creating, Error woul...

The multiverse decided, "Ayo, Imma need to make a whole other living thing to handle this Balance shit yo." Though there are restrictions, your boi is out in t...