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't ever let it fade from his mind. The dust. The cries. Watching the screen with Alphys as a child just rampaged in the underground. He is going to snap. He is mad. He is sad. He can never forget. Cover is NOT mine, find it online if you want ::Rights for the original concept and media 'Undertale' are all under the jurisdiction of Toby Fox. All other workings are done by me.::

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

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 to give a child. Alas, that's what Y/n Gremory had to endure for so long... Until he found an escape, to somewhere THEY'D never find him... The Void...

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 Flowey's revival as souless talking flower, Sans makes a discovery under the mound of snow, Papyrus has always wanted to be a big brother anyways. *Edited Summary (29/09/2025)

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 ?

It is what it says on the tin. So, have those questions-a-ready! 'Cause it's about to get fun!

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 the prison with someone following you behind your back? Who would have known an echo flower would have revealed too many things? Who would have known you'd fall in love again? Words count: 55.608

This is a new sans au I want to make soooo here we gooooooo!!!!!!!!! (btw hope people enjoy:P)

If you only care about one person, How broken will you be when they leave? How lost would you be without your light in the darkness? How far would you go to see them again; To chase the only light in your dark life?

Sans is a comedian, telling puns and playing pranks is part of who he is. Or is it? Resets, his parents deaths, and bringing up his brother alone has all taken its toll on the pun loving skeleton sending him into a spiralling depression. His comic front is becoming harder to uphold against the wear of time, only to be worsened by a total lack of sleep and a new threat in the underground , but will his brother ever discover ... The truth behind his mask? First ever fanfic, constructive criticism is encouraged. I don't own the characters or the art included in or on the book. Undertale and all characters belongs to Toby Fox.

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 gone wrong, and a strong connection between the two boys, can Frisk and his friends change Chara's view of monsters? (original story was posted on Quotev on Feburary 22, 2016)

The young skelebros escape from the core and head to Snowdin. Grillby finds them decides to take them in but finds out it may be much more difficult than he thought. Papyrus likes Grillby but it takes Sans some time before fully trusting him and even then there are things that he doesn't want to share. Although Sans struggles with his magic and with meeting new monsters. But, he's able to find some close friends when situations get rough. Ik my art is kinda weird but it was mostly just for fun. I'm definitely no artist. All art is still mine tho. I won't edit much here. Fully edited story on Archive of Our Own. Same name as here.

Jessica understood that Gaster wasn't too fond of her. No matter how hard she tried, her efforts to make him feel better always backfired. But she was sure he'd change his mind eventually... Just a *little* bit... Right? - Haaah! The Greyster obsession lives on in my brain! So here's an epic fanfic about these cuties <33 (again...) as you can probably tell i put 0 effort into the cover and ill probably fix it up eventually, just not now because im incredibly lazy. Anyway, enjoy the story!!

Endless nightmares everyday. They never stop, they keep on coming. 6 hours of closing doors and running. You just wish it could end. You just wish you could end it all. (Pictures aren't mine and belong to their respective owners.) Book 1/3

wrath!tale is a undertale AT where the true reset's at the end of a genocide run never effected sans, sans slowly morths into someone else entirely, and the timeline changes around him as well, effecting not only him, but the people around him as well. (PS. it is written in notes/entries, so its more like seeing how he writes about his experiences, i wont go into every timeline, since there are repeated genocide runs) (PS. ABSOLUTELY NONE OF THE ART SEEN IN THIS IS MINE! I WILL CREDIT THE ARTISTS I ACTUALLY KNOW)

You'd think high school is stressful enough, but now Frisk has to deal with moving to a new school for Junior year. Whether it's dealing with G A.K.A. the school flirt, procrastination, strict teachers, or dealing with drama Frisk definitely has her hands full this year. How will she react when the school flirt, G gets her deeper into trouble than she'd like? Or when a liar turns everything on her and tries to sabotage her reputation? Or even risking missing prom? Do the strict rules at her strange new high school have a deeper meaning behind them? These are all questions that Frisk is determined to find the answers to- No matter what it takes to get them. Brief Summary of the AU: Frisk and G are stuck in a dystopian reality where the population is divided in two. (Thus, the name EchoTOPIA) The children of the criminals, rebels and outcasts are sent to one community: Accreton. The children of the richer, more famous civilians are sent to a richer, more technologically advanced city. It's our time to make a move It's our time to make amends It's our time to break the rules Let's begin -Renegades, X Ambassadors ((SIDE NOTE)) I do NOT own any of the art used in the chapters or for the book cover. I only edited the cover slightly. Echotale belongs to Yoralim and G! Sans belongs to Borurou. This book belongs to me. Artist for the cover: https://adlez-axel.tumblr.com/

After Frisk "fell" into the core, they became core!Frisk. While being stuck down there, Core!Frisk is determine to escape and after finding new friends inside the core trying to do the same, Core!Frisk has become more determined to free every trapped core-monsters(the exiled) to freedom.

A scifell fanfic for all you edgy sinners✨

There's a girl who lives alone with full darkness around her. She's familyless and had PTSD. Her name was Syafiqah, who run away the girl from been killed. But one day, she fights with the most dangerous person in the world, Princess Emilia. Who everyone is scared. And when they fight, one of them is lost, Syafiqah is losing because she doesn't have anything to fight. She loses her right eye because of the cut. But suddenly, someone saved her. A skeleton man. Who is he? What happened next? Are 'they' make Syafiqah's life even better than before? The answer is in this book! (A Gaster Gang AU where the gang didn't met Swapfell nor Maestro before Syafiqah living with them)

nothing here