Undertaleau Stories

There are two sides in the Multiverse. There are the Star Sanses, known to be the heroes and saviors of the Multiverse. And then there are the Bad Sanses, known to cause...

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...

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...

A young woman, left alone after her family sadly passed in a car accident, suffers with PTSD and Anthropophobia (Fear of people.) Her only happiness in this world is the...

You're the Ink of your multiverse, and you don't even know it. Well, until you meet the Ink of another, along with Error. -NOTES- I made the cover! This obviously isn't...

Cover image made by me. Someone meets their end too soon and meets someone who gives them another chance to live a more fulfilling life. One that they would enjoy despit...

You are a introvert who loves undertale and multiverse and loves to play video games and listin to music. What will happen if one day you meet the skele-bros of differ...

⪼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...

Y/n was born in the real world but he had lacked adventure in his life. The only thing that had given him a sense of adventure was a few games like undertale and Deltaru...

Thanks for the votes and comments, love yous! ♡ The reader is the mother/mother figure to a specific Sans AU. This is not romantic nor is it a kink. Most of these onesho...

when you were walking down the street truck-kun decided it was your turn to be reincarnated Met a God who gave you three wishes strangely enough you choose to be reinca...

reader is transported into an old au they made when they were younger read as they go through there daily life in a new form and dealing with new but familiar faces p.s...

~ Dream was born 21 years after Nightmare was. Right after he was born, he was already titled as the 'Guardian of Positivity'. Quite too young for a child like him. But...

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...

Y/N lives in a world of 2 brothers. Long ago, they were protectors of a tree, one that held both positive and negative energies. Dream, and Nightmare. Dream protected t...

A person named Y/N M/N L/N moved to Mount Ebott city 3 years ago. They are now (At least) 25 years old and work at a café to earn money. But what happens if they meet th...

Yeah sorry gained an idea on if someone became swap Gaster Also they may be apathetic or just confused on their feelings and MAYBE Autistic, I may be a bit wrong on ap...

When I had just finished creating my character in Deltarune, which was then discarded by the game, everything had suddenly gone bright.

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...

(Y/N) loved horror stories- true crime, creepy-pastas, urban legends. You name it, they liked it. When a walking nightmare (pun intended) showed itself to the young huma...