Undertale
198 stories
Hey, Doll | Gaster!Sans x Reader by dacatnxtdoor
dacatnxtdoor
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Alone in a condemned world where monsters and humans fight for power constantly, Y/N survives off of the wood's riches and the small scraps of shelter she can find in ghost towns. Allies and friends have come and gone during the war, either killed or have parted ways. It's not all that bad. She could be dead, after all. One afternoon when shipments from the Human Capital come on a train, she meets a mysterious stranger who saves her life. He's a monster, no doubt, a skeleton to be exact. Y/N is intrigued by the monster and decides to follow him into the next town over where he disappears into an abandoned warehouse. Y/N follows him in only to be pinned to the wall for questioning. After answering all his questions, introductions are made and Y/N learns that the skeleton's name is G. Y/N likes G despite his hateful nature and somehow convinces him to let her come along on a quest he's taking to save his brother from the Monster Capital where they took him for war. After surviving assaults, the government, and Mother Nature herself, Y/N and G start to form a special bond that neither of them wants to break. But when everything goes wrong and neither of them is strong enough to prevent it, Y/N finds that the capitals that she had always hated are far more sinister than she could've ever imagined. ((COVER ART IS NOT MINE))
Undertale Remastered (Undertale x Male Reader) by BigDaddyDelta2
BigDaddyDelta2
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So, just to make it Very Clear, all the characters in this story is and will be 18+. This story is in a Different AU that I've made myself. I just want you guys to know that this is my first story on Wattpad, and yes Chara and Frisk are both girls. If you don't like it, then leave. I worked a lot on it and I'm still working on it. This story is actually one of my many stories that I have written in my personal time and I just wanted to share this one with you guys and this story was also written when I had to do it on my schools computer so I couldn't put anything *chuckles* 'kinky' in it. But since I have graduated from my high school, I can still access this and many of my other stories from my school account, so there Will be some lemons in the story Be warned! But you can skip it when it says: (*Lemon Start*) and you can skip to when it says: (*Lemon Stop*) So without a further a due, let's begin!!😁😁😁 This story is about a boy named Y/n and he has heard of the legend about Mt. Ebott and the rumors about it. Most people believed that they were lies that parents would tell their kids when they misbehave and stuff like that. But Y/n wanted to prove to everyone that he could go to Mt.Ebott and come back to tell the tale. So he climbed the mountain and once he reached the top, he got a little ballzy and tried to look down the hole and instead he ends up tripping on a rouge vine. I do not own Undertale!! It belongs to none other than Toby Fox, and You belong to you!
Despair - Undertale x Male reader  by Calamity-boi
Calamity-boi
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(Cover by Hetiru on Deviant Art.) Several years after Monsters returned to the surface, this story follows Y/N, a quiet and reserved highschool student just trying his best to manage his day to day life. Between the bullies, lack of a family or friends, and two new transfer students making everything even more difficult for him, Y/N decides he doesn't need to deal with it anymore - and finds himself at Mt Ebott. ⚠️ WARNING ⚠️ This is a somewhat dark story. If that's not your thing, or if subjects like depression, suicide, and self harm are difficult for you, please do not read this. Otherwise, please enjoy! (Once I actually start adding chapters of course.)
Undertale x male reader - Reborn  by kinder1000
kinder1000
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The one that made it the furthest in the underground, perseverance. Perseverance had beaten almost all of the monsters in the underground from papyrus to sans and undyne but ultimately couldn't finish the task of beating asgore and so his soul was took from him. However, years went by and his soul was left in the underground along with the other six after Frisk had broke the barrier but this changed when gaster had finally been freed from his hell
Soulless (Undertale FanFiction)  by BanthaBug
BanthaBug
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In the world of Undertale, it's supposed to be killed or be killed. This means for many, you have to fight if you're gonna survive. But in a world of fighting on a spiritual plane, how do you fight without a soul? The rumor of red-heads having no soul was nothing but a rumor until the girl was born. Still able to feel the basics of emotion, but without fear or love how will she fair, in the underground? *I have not edited this. I mostly write from 10pm-2am so in unedited parts it may get a bit confusing. Once it's laid out I'll go back and do the editing. Also know that I write approximately 20 pages an update. So if you're not into the longer reader turn back now* *I DON'T OWN ANY OF UNDERTALE!!!! NO CHARACTERS NO NUTTIN! ONLY THE MAIN CHARACTER AND PLOT IS MINE ONLY!!*
The Faults in Our Souls ~ Gaster x Reader (Under editing) by _T3chn0_
_T3chn0_
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"Do you not want to go back home? To the surface?" °°°°°°°°°°°°°°°° "No." °°°°°°°°°°°°°°°° "Why?" °°°°°°°°°°°°°°°° "Because my home is right here, sitting next to me." _______________________ You were used to the unfortunates of life. Everyone had them, it was normal, but life decided to take a lemon, freeze it, then throw it at your face. But, it wasn't like it was THAT bad... Until you fell into the Underground that'd been sealed for over a hundred years, of course. Friends along the way help you through the sudden changes in your life, and a bone-ified family as well. (82,110 words) (Undertale does not belong to me, only the characters I added for plot reasonings. You belong to yourself, of course.)
Universal Surface Angel  by Lithriel
Lithriel
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Reader insert. What if W.D Gaster didn't just get split between time and space, but actually ended up in your world in an abandoned hospital you called home? Your were a young child he decided to use as experiments to test human determination in said world and breaks physical laws to test human possibility? He knows of the powers you gained from his experiments... all but one, this one allows you to tear realities just enough to teleport into them. Knowing of Undertale you felt bad for the monsters stuck below in their world and wish to help them, but something goes wrong and you end up going to certain AUs and helping them, gaining the attention of some bad skeletons who now desire your power for them-selfish-selfs.
The eigth Soul (Undertale AU) sans x reader (Dark Soul) by QUEENDUBSTEP
QUEENDUBSTEP
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A surface AU I made up myself! Summary: You lived your boring life as always until monsters finally reached the surface and spiced things up. You gained a new job through them as a scientist and never thought you would get to meet so many of them in person. Little did you know that monster magic brought up a completely different side inside of you that you didnt even know exsisted, especially a certain skeleton monster who seems to be having the same problems. Can you turn back to normal together, will you stay the way you are or will you be able to part forever in order to live perfectly normal lives? There is no smut. A few small kissing scenes, but not more. I tried to focus more on story telling and relation (I think). [This is really not one of my best stories, so pardon me for the Quality to the end. I hope you enjoy it none the less!]
]Sanscest Oneshots[ by Leffee
Leffee
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If everything went well - a bunch of oneshots with a bunch of ships. Rules and requests inside. Also please don't leave any suggestive comments, there's a reason why this book doesn't have lemons (aka I'm sex repulsed). (Cover belongs to heartkillers on tumblr)
Darkness Is Nicer Than It Seems (Nightmare Sans x Reader) by Lollipopswirl99
Lollipopswirl99
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(Y/N) had a regular life. A normal job, home, everything. Sure she had her own problems like insomnia, nightmares, and no friends but that wasn't anything to special. Though all of that would change when she finally decides to go over to that very special Gold and Dark tree.