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...

Have you ever wondered what happened before the Seventh human fell. Before YOU...came to the Underground? The person that manipulated time and space, who played with the...

Sans has had an interesting past. A past that even his beloved brother barely even knows of. A past that he wishes could remain a secret. But when the questions start be...

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 ?

We follow YOU, the Player, on this epic Undertale story. You get sucked into the game on your computer and have no idea what to expect. Will you be able to get back home...

{ Chara and Frisk are girls in this story} Gaster attempts to save Frisk and Chara during the fight with The God of Hyperdeath and bring them to safety. But you know how...

"Do you not want to go back home? To the surface?" °°°°°°°°°°°°°°°° "No." °°°°°°°°°°°°°°°° "Why?" °°°°°°°°°°°°°°°° "Because my home i...

The RiverPerson is truly a mysterious monster, only known as to sing and to help you travel place to place, they were an NPC, surely he wouldn't be him, right? Oh how wr...

(I'll make a real description one someday) But basically it's what would it be like if sans adopted a daughter after the barrier broke (I'll make a real cover someday) :...

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

Long before Frisk ever fell down to the underground... Before Gaster got lost within the Core... He found something... or rather someone of great value to him ...someone...

Here ya go pplz. Tween: Short for Tweenager: 8-14 years old (I know, weird)

Art is not mine but it's super cute Credit for art to: Skirtzzz Art Hope you enjoy X

Almost four years marking the anniversary of monster kind reaching the surface, the human ambassador Frisk goes missing. Severing the link between the two species, an al...

"Like Underfell, but a different AU."

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...

??? was a fan of undertale heavily but when she suddenly got hit with a truck (because everyone dies from trucks when they get isekaied.)she was expecting to be dead so...

*FEATURED STORY* As Judge for King Asgore Dreemurr, Sans has seen a lot of strange stuff. But when he wakes up with the feeling that something is completely wrong, he de...