Undertale
10 stories
Stuck in Between (Reaper!Sans X Reader)  by BanthaBug
BanthaBug
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When your heart stops, you're supposed to stop there. But when your heart stops in the Underground, your soul resets. But what if the reset doesn't work. You're stuck in a stalemate between life and death after your attempted reset glitches. Memories fuzzy and distant, lonely and cold, what does one do to survive their own personal purgatory? Average word count: 1800 - 2200 REAPERTALE FANFIC
I Don't Dance, I Perform ~DanceTale!Sans x Reader by BanthaBug
BanthaBug
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In this world, you dance for your life. But in your world, dancing is just a part of your act. When helping Frisk with their stamina by dancing up Mt. Ebott, you find yourself in a rather monstrous situation. Lace up your dancing shoes, it's about to get funky in here. [Unfinished] ((Sorry... I'll try to finish it in time but I'm unsure how long that'll tale.))
Sans x Reader One-Shot Booklet by ZanaBSparrows
ZanaBSparrows
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This is just a collection of Undertale-themed one-shots that go along with the plot of my Sans x Reader fanfic, "When Two Souls Meet." It's a community project, and will have several entries from the winners of my one-shot contest, as well as some chapters written by yours truly. This can be read as a stand-alone group of one-shots, or connected directly to WTSM, as it is technically a direct continuation.
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
ZanaBSparrows
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    Parts 28
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. Please note the the story is primarily on Quotev, so updates to Wattpad may be late, or lag behind that of Quotev. The story also has the potential to become mature. (I haven't decided yet.)
When Two Fates Intertwine (Sans x Reader) by ZanaBSparrows
ZanaBSparrows
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    Parts 13
[THIS IS A SEQUEL TO MY OTHER FANFIC "WHEN TWO SOULS MEET!" If you haven't read it, I would highly suggest it--the story won't make much sense otherwise.] Sans has finally found someone he can trust--Frisk's sister, the eighth fallen human. After months of step-siding and awkward interactions, the two are finally a couple. Things are finally falling into place--there are no more resets, and Chara and Flowey have been a lot more quiet in the last few months. But things can't stay this way... can they?
Like Old Times (Sans X Reader; Sequel to MOAB) by Flutterbat276
Flutterbat276
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You killed Sans, Frisk resets, you're falling. But you aren't alone. "You remember" The sequel to My One and Bonely! (MOAB) If you haven't read it I HIGHLY suggest you do BEFORE reading this one! -I unfortunately will not be updating this story for the foreseeable future. If you read it, thank you. If not, I understand. Thank you so much for the support on MOAB and LOT. It means a lot to me Cover by Little_Cherry_Panda
My Greatest Experiment (Skelebros' Origin Story) by ZanaBSparrows
ZanaBSparrows
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After much research and theorizing, I've decided that I'm going to attempt it. It's risky, but I'm so desperate at this point that I'm willing to put my own well being on the line. If I survive, this may just turn out to be very... interesting. This is my thoughts on the origins of Sans and Papyrus, as well as their connection to Gaster. It will be connected to the ZanaTale timeline (or, in otherwords, my Sans x Reader fanfic "When Two Souls Meet"). Loosely inspired by the HandPlates AU by Zarla. Awesome cover image by Dweebycake.
Cryophobia - (Sans x Reader) by trainerblueoak
trainerblueoak
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Next person to comment on this monstrosity gets fucking vored!! × ❝You made your choice a long time ago.❞
Unexpected Love | Sans x Reader by dacatnxtdoor
dacatnxtdoor
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You climbed the famous Mt. Ebott to prove to a group of your friends that humans don't disappear when they go up the mountain. While walking around the peak, you trip over a root in the ground and fall forward, expecting to hit the ground. Instead, you were met with open air. As you fell down the large hole, you let out a shrill scream before hitting the ground and blacking out. When you wake up, you find yourself in the Underground where monsters had been banished to by the humans. You meet several monsters down in the Underground, some becoming friends and some becoming enemies. One particular monster though, has been making your heart flutter and your tongue get tied. Sans the skeleton. A new threat appears when a human that had been thought to be dead comes back and threatens you and the entire Underground. Will you be able to stop them or will you be used as a puppet and watch your friends die? Maybe the only thing that can defeat LOVE is love... Author's Note: this was my very first story so sorry if there's bad grammar or confusing scenes, enjoy my awful writing! ((COVER ART IS NOT MINE))
I Can Hear You. [Sans x reader] by MelodyofChaos
MelodyofChaos
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This is a collection of chapters from my [Sans x reader] fanfic, Can You Hear Me? but from Sans perspective. Before reading this, I suggest you take a look at the main story, as this one will be based on the votes I get for the different chapters and probably won't make sense otherwise. It's been a few years since the barrier was finally broken by a human named Frisk, finally releasing the monsters back to the surface. They were all settling down well, finding jobs, learning about the surfaces history, and integrating themselves in the new culture that had started since their appearance. That's what most monsters were doing, anyway. Sans was a different story. Though he was happy everything had worked out in the end, and that the monsters were back on the surface, he was having trouble finding anything that really interested him up there. But that suited him fine, he thought, as long as everyone else was happy. That is, until he met (y/n). By some chance, Mettaton had been working with the rising star (y/n) Heir, and by another coincidence, dragged her along to one of the get togethers the gang had at Papyrus' house. That's the night everything changed for the group of friends that rallied around Frisk, and, that's also the night things got a lot more interesting for Sans on the surface. (Disclaimer on the cover: this is simply how I, the author, imagine (y/n) Heir. When I draw her, this is simply the design I use. Feel free to imagine her however you like, as this is a Sans x reader)