Gaster Stories

I decided to do an ask & dare with my AU, Staintale. Staintale is a AU where Frisk and Chara are controlled by the player, Chara, Frisk, Flowey, and Sans all remember re...

Dust's life hasn't exactly been the greatest. It gets worse when a portal opens under a battleground and sucks him in, along with everyone else. The problems compound wh...

The Underground is in crisis, most monsters are going insane to the point of killing each other and are living under harsh rules under the King... Having the goal to col...

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Chara had won. Dust had fully lost his mind. But little did chara know just how wrong she was about him. He was never obsessed with chara. Nor did he ever become obsesse...

When Sans first defended the lone human that fell, Kolton, he didn't expect for his scientist of a father to take care of him . . . nor the boy's two older siblings, War...

The reader wakes up to a new life as a monster skeleton. In a new world, that's filled with monsters, humans, and magic. But instead of living their new life to the full...

Frisk is 16 Chara is 18 Sans is 18 Papyrus is 17 Every other character in the underground is over the age of 18. There will be time skips in the story, but written out...

[3rd book] So it's yandere Undertale One shots because I can. Also because some characters just kinda need to be more recognize. Slow updates? Or it will just Update at...

You have fallen in the underground. Find a way home. | | | WARNING: This book may contain spoilers for the pacifist route of Undertale.

What if our favorite knuklehead ninja goes to Undertale multiverse, become a monster, and has gamer system? This is my first story.

One month before Frisk falls into the Underground a different human falls, someone that is not from this world, but from ours, and now they have the power to change the...

A young woman dies and is reincarnated in an Undertal Au she made as one of the Skeleton twins. Will she change the multiverse? She changes things in her AU for good or...

(Undertale/Deltarune belongs to Toby Fox! Short prequel story to Down To Ebott Lake following the early months the monsters spent on the surface, as well as Asriel's tra...

Small warning if you don't like the ship Gaster x grillby don't read Also no sex scenes or anything sooo yeah Also might be one of those ones that I work on when I can'...

"What's that look for? Are you perhaps unhappy to see me?" "Oh no. Oh no, quite the contrary, my love. I've craved to be with you for the longest time&quo...

Join the crew on various adventures ranging from mundane lounging at home, unleashing the beast in Among Us, and ruining friendships in Monopoly to epic quests, journeys...

Sans knew he wasn't like them... he was never one of their kind in the first place. Just an imposter. It was only time until his past came to bite him and they found o...

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...

Sans but cute girl. been thinking of that for a while now. Sans has been a lazy, laid-back girl her whole life. She's not interested in relationships at all, because sh...