UNDERTALE
19 stories
G!Sans X reader by LongbeforeGirls
LongbeforeGirls
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Now, you're about to read a story where YOU are the main character, if you're a fan of echotale and G!sans then this is the right story :3 Its my first story so please do not expect the best, but ill try :) Otherwise i'll be posting stories with other characters when this is done, hope you'll enjoy! :') Love ya!
Try me, Bones. (Gaster!Sans X Reader) Wattys2016 by Silverhaunter
Silverhaunter
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The only way to the top in this world, this world born of war, born of death, the only way of ascension? ...is to become someone you don't want to be. And so I've got to break a promise. Because I've got a job to do. And there's no-one who's going to keep me from it. ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ How can something so enticing have such awful side affects? All the itching and the scratching from withdrawl keeps me out of check, I am fixated on all of the things that we were together, but those are fragments that are better off lost forever. (Crystalline- Gumi English)
Blown Through The Rift (Gaster!Sans X Reader)  by BanthaBug
BanthaBug
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You were working with Alphys in the lab in Undertale when chaos strikes! In a freak accident, concentrated determination is mixed with an unnamed concoction and blow you through a dimensional rift. When you reawake, you find yourself in what seems to be the beginning of Undertale once again. Upset but not overly surprised, you make your way back to Alphys's lab... Only to find her lab assistant is no longer you! Working with Alphys now is a tall, punkish skeleton with two cracks in his skull and a snarky attitude. As they help you find your way home, will you find more than that? *I DO NOT OWN UNDERTALE OR GASTERTALE!!! I WISH I DID BUT I DO NOT! THIS IS JUST A FANFICTION!!*
Eyes of Fire (Gaster!Sans x Reader) by pst_writes
pst_writes
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(FAN FICTION BASED OFF OF VIDEO GAME 'UNDERTALE') His eyes were like fire. Amber. Dangerous. But they intrigued me. The flames of his soul danced and encased my heart. It was needless to say that I didn't mind. (COMPLETED)
Gaster Sans X Reader: Prisons And Empty Walls by Skellimania
Skellimania
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What would you do if you were framed for a crime you didn't do? What will happen if you fall in love with the biggest, baddest criminal there?
Sans x Frisk Short Stories by Ally_Sato
Ally_Sato
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Want to hear my crazy stories about my OTP? This is a book filled with it. I present to you my one-shots of Sans x Frisk!
So This Is Determination {Frisk x Sans} by gracemar100
gracemar100
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Sans. A monster with a skele-ton of puns up his sleeve. Frisk. A human girl who fell down into the ruins. Toriel. A mother figure for Frisk. Papyrus. Sans's younger brother who loves spaghetti. This. A story about them, and more.
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
ZanaBSparrows
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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 and over again. Sometimes, he'd even done the killing himself. And no one ever remembers. Not even the kid herself. It's an exhausting cycle, one that never seems to end. But there's something different about this run. Another human's fallen down... the kid's sister.
A Little Bonely (Sans X Reader) by UltimateUndertrash
UltimateUndertrash
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Monsters always fasinated you. Ever since Frisk broke the barrier and freed the monsters, humanity didnt take it too well but they are slowly getting used to it. Slowly. Very...slowly. (btw Chara is depicted as a female in this story, and so is frisk. Dun be triggy) HEY ALL! This is my first fanfiction EVER! so dont judge. [NC 16] at some parts :>
My One and Bonely (Sans x Reader) by Flutterbat276
Flutterbat276
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My first story. It's a sans x reader fic, so don't judge too harshly. Also I have some bad pacing issues, but I hope yall will ignore them. Anyways on with the summary! You see monsters everywhere. All of theme unique and friendly. You ask "how could anyone hate them?" When you save one of them, you're life takes a drastic turn.....for the better. Highest rank: #16 in Undertale (June 2020)