Gaster Stories

Your favorite skeleton is back at it again... and again... agagaagaag Sans has had enough. Everyone is at the surface, holding their own jobs and lives. But... Sans can'...

This is a story before the last human fell around the time Chara was still alive and well. Humans were not being hunted till the adopted prince's passing, however with a...

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...

Even though the Underground is now empty, except for some people, you still stupidly managed to fall in the once prison for monsters. Who knew you would get away from th...

What happens when the Gaster Gang handle a human child situation? Read and find out! Based from Bun-bunmuse art story. ps. the reader is 5 year old girl ?

Chara believed themself to be a Demon who should Erase the world. They were wrong. They believed that they could easily move on to the next. They were wrong. They believ...

(Y/n) has had a rough life, how could it get any worse? Let's let G answer that. ~~ This is a Complete Rewrite of Hold Still! I don't own any of the pictures or Songs.

Abandoned on Mt. Ebott at the tender age of five, young Harry's unsurprisingly died, but Death's always had a weird relationship with his variant... Meanwhile, before Fl...

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Let's get this over with... HIGHEST RANKING: #35 in Fanfiction June, 23, 2017 ALL IMAGES USED ARE NOT MINE! Cover was made by Bunnymuse on her Tumbler (I think). Bunnym...

Long ago, two races ruled over Earth: HUMANS and MONSTERS. One day, war broke out between the two races. After a long battle, the humans were victorious. They sealed th...

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

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...

Author: I wanna do something I haven't seen before. Hmmm... what about one where two people like the reader! And the reader can shapeshift! I haven't seen a shapeshifter...

The Monsters have been thrown into more chaos than they could've imagined. Otherworldly forces have interfered, tampering with the lives of heroes and idols. When Frisk...

I never meant to fall in love. I never meant to have children. I never meant to become involved in a war. I never meant to lose people I love. I never meant to let us be...

💀I did not originally write this, it's just a story I found that I rlly liked, 💀 it's a lemon fic of reader x goopy gaster, this contains adult themes such as breeding...

Gaster was born and raised in a world torn apart by human greed, then... it ended. The great barrier seal, trapping them underground. Gaster's True story, to the Core an...

No one ever expected for the timelines to cross, that is, until there were two of them. The lovable and friendly Frisk, and the evil killer, Chara. With an experiment go...

5 souls, Gaster's children, forged into warriors and the perfect specimens for a war they never wanted to fight Kris' story, the youngest and fragilest. A boy, made to s...