Gaster Stories

Complete! The player has just finished fighting sans and has left him to die. As sans turns to dust he sees a flash of light before everything goes black. He then wakes...

Gaster, the Royal Scientist created best of his invention. Core of Hotland. But there was an accident that ended his life. As a result of the crash at launch, he fell di...

A/n: I got some inspiration from another story, I'll try not to make it a carbon copy. Gremory Rose, to be exact. The forgotten child. The Cursed One. Such cruel names t...

(Y/n) Gaster is a human with powers that no one knows about. What would happen if he were to be living with an alien girl? To Love Ru isn't owned by me. Sans from Undert...

~o0o~ Book 1 of the "Better Times" trilogy ~o0o~ (Book two: "A Name to Remember") (Book three: "No One is Happy with This") There was a tim...

Reincarnated as Killer Sans but a bit different. First getting reborn and then thrown into a trap AU. Too bed the MC is a genius. (Pun intantional) How that works while...

This Story is taking place after the phase 3 event of Sans, finally losing against the human. Sans wakes up in a mansion and meeting with a blonde yellow with ponytail h...

Sans is brought to the world of BNHA. He wakes on the roof of UA.He'll meet new friends and enemies, old and new. But will he ever get over the jar, filled with his bro...

The adoptive brother of Ruby and Yang attends Beacon Academy. stuff happened and I lost my account, so I'm doing my story again on my new account, I'm SO sorry for this...

Sans has had an interesting past. A past that even his beloved brother barely even knows of. A past that, despite being so long ago, always finds a way to bite back. A p...

Just like any other Sans X MHA/BNHA, Sans dies but with Chara. Exactly 100 years later, Sans woke up in the middle of Japan. Will he get the hang of his new world? Unde...

A series of semi-realistic scenarios including a handful of Undertale characters. In otherwords, stick around. ... Please.

You are the elder brother of Frisk. I'll explain later. This book will not be updated for a while, sorry. Completed: December 2nd, 2020 SC Book# 12

Undertale gang reacts to songs, animations, comics, and more.

Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over a...

『Can this be true? I can't believe what I've seen. A soul like yours - to be as strong as you are. A memory stirs... you made me think of a man, from years ago - a man w...

You've always have had a creepy smile, and it doesn't help that you have these scars on your face now.... It doesn't matter though, you're fine with it, and he's happy t...

Error didn't know what to expect after being pushed into the Void. He didn't expect to be transformed into a teenager. He didn't expect to fall into a world full of drag...

I don't own Undertale or any images.