1 - 20 of 41,090 Works in Sans (Undertale)
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A year has passed since Frisk has freed the Underground, and their desire to learn more about their friends hasn't stopped there. After asking Asgore about the lack of skeleton monsters and realizing that the mystery behind Sans and Papyrus goes much further than they thought, they set out to find answers. What started as one question quickly spirals, and they and their friends stumble into something bigger than they ever could have imagined.
Summary to be redone as the story goes on.
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Two friends, just wanting to find an escape to their ruined world, try to use a machine that would supposedly fix everything.
They really didn't expect to wake up in a new multiverse.
They definitely did NOT expect to wake up as the Destroyer and Creator themselves.
Both just want to find their friend, for them to be ok.
The Multiverse has bigger plans for them, however.
Or: two kids make themselves spawn in the UTMV, but they have to fight each other to keep the balance.
Generally random updates but never more than a week.
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Monsters have appeared from a mountain, in your town! Interested in this new development you head home with high hopes. Sadly it seems humans will be humans, and for some reason you keep getting caught in the cross fire. Luckily you've made some new friends to help you out along the way!
You were just about to head into the nearby town when your phone went off, it was a text. From Otto of all people. A video of him, and what looked like monsters walking behind him. "You should come home (Y/n), things just got interesting."
Reader is female (sorry) there will be smut at some point, don't know when though...
Series
- Part 1 of Blood N Bones Stuff
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Kamari333's Kinktober shorts, following the prompts set along HERE.
Another year of Kamari333 doing their best to celebrate Kinkplay and the fun of erotica <3
Individual tags in the chapter summaries and notes.
Functional Table of Contents (with tags and warnings) included!
Series
- Part 9 of Kamari333 Kinktober Archive
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❗️❗️❗️❗️❗️❗️My alternative headcanon (not Canon ) end of horrtsle if aliza was the same like in comics a true ,kind ,empathetic pacifist but when she gets captured by mettaton , none of the monsters come to help her so shes taken to the the barrier which breaks it but undyne changes her plan of starting genocide against the humans once she find out about how much healthier,strong and advanced humans have gotten (not to mention bombs/nuclear weapons ) +very moved by alizas effect on underground so she (begrudgingly) co operated with human officials so monster can get help ,training and therapy to integrate into society (so the conform ,work and DONT eat humans ) Everyone though aliza had died, but she didnt ,she come back !
But ,its different.
Her purple ,determined yet kind hearted had come back together after being shattered one too many times and drained by the barrier, instead now it was a coal black soul filled with resentment and annoyance .While monsters recover aliza cannot. -
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My version of Flowerfell. Frisk, Chara, and Flowey are the main focus because I think this friendship has a (skele) ton of potential that's sometimes overlooked.
I will not be shipping Frisk, Chara, or Flowey with anybody, including each other. In this story, Frisk is seven, Chara is thirteen, and Asriel/Flowey is twelve. I will include a few scenes of Sans x Grillby, and I may include Papyrus x Mettaton, but I'm not sure.
There will be angst, and a closer look at how Frisk's health would be affected by buttercups growing out of their skin. If you don't know what that would entail, please do research before reading. Saying that it isn't pretty would be an understatement.
There will be fluff and fun and shenanigans, it isn't JUST angst.
Edit: I decided to add in an original character. Boom. -
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One day, our main character decides to open up Undertale before going out with some friends, he leaves the game on when he leaves, and when he returns, he finds the game with completely new dialogue, but as he finishes reading it, he slowly falls unconscious until he wakes up in the world of the game he loved.
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So, I heard you like skeletons...
Reader insert prompt fills for @skeletonh0e's sans-centric Kinktober challenge on tumblr
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A Jaded Emerald by KTamao205
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
15 Oct 2025
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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)
Series
- Part 1 of MultiTaleVerse
- Part 1 of Arcalith
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In This World of Infinite Choices by Lireyy
Fandoms: Multi-Fandom, Doki Doki Literature Club! (Visual Novel), Five Nights at Freddy's, Undertale (Video Game)
15 Oct 2025
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Monika is tired - oh so very tired. It's been what feels like eternity stuck in the post-deletion void, and despite herself she tried to make an escape with her friends (or, what's left of them). In her desperation and loneliness, she allows herself to be used by a certain piece of malware, who now threatens to subsume and corrupt every game he can get his hands on. Now the young poet must venture through numerous worlds to find some way to stop him, and, with the help of everyone's favorite bone-ified comedian, might just grow a little along the way.
TL;DR, it's Indie Cross meets Learning with Pibby, and braincells have no place here.
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Years after monster and human society merge, a young monster returns to the Underground with the intention of finding a story to tell. She finds that story in a stack of well loved letters between one Cathode and Mailman.
NOTICE: The final arc of this story contains implied suicidal ideation and serious self-destructive behaviors. If you are not in a position to read this sort of thing, you can stop reading after Chapter 22 and skip from there straight to the epilogue!
Series
- Part 1 of Dear Mailman: Yours, Cathode
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The Doctor's Descent by Feanyx1
Fandoms: Undertale (Video Game), Doctor Who (2005), Deltarune (Video Game), Doctor Who
15 Oct 2025
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He thought that the radiation would kill him. He thought that his time as the Doctor would come to a sad and brutal end. He was wrong. And that was so much worse.
In his efforts to find himself, and without his companions, he accidentally stumbles onto a monstrous civilization miles below the Earth. With his newfound DETERMINATION and some new allies, he'll come to realize what it truly means to be a friend, and learn how to live his last lives with his head held high.
And make sure that, just this once, everybody lives.
OR
Undertale but the Tenth Doctor replaces Frisk. Fluff, angst, AUs, and timeline shenanigans ensue.
*No knowledge of Undertale or Doctor Who is required, though it is helpful if you've experienced at least one of them.
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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
15 Oct 2025
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New kinktober! One chapter a day for the entire month!!! With a list I made myself, very excited to show everything I've written.
Just like the other ones every chapter contains some form of hypnosis/mind control/brainwashing. I'll do my best to tag but i can't tag absolutely everything so look at the warnings at each chapter or in the table of contents.Series
- Part 14 of Undertail hypnosis series
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papyrus looks up to his big brother. sans looks down at him.
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october 9th & 20th : emotional manipulation, cassandra truth, after it's over, "i didn't react the way i should have, i'm sorry."
Series
- Part 5 of whumptober 2025
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After the battle, you look at your hands... why did I became a skeleton? by Quinme
Fandoms: Undertale (Video Game)
15 Oct 2025
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Your dear friend was in danger, she got attacked by a mysterious skeleton with a big blade. You did your best to protect her with a weapon that you always take with you anywhere, but this introducer was a powerful enemy. After a long battle, you lay on the ground, coughing your own blood. Everything hurts, but at least your friend had time to run away. It's clear that you were dying, this is probably the end. But you can do something before taking your last breath! You promised your father to stop using magic because it's too chaotic, but what choice did you have anyway? Using the remains of your power and reaching for your soul, you use a spell to end the skeleton and take him with you in the hugs of death! Silence... did it work?
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Ink and Error have maintained a friendship through thick and thin. Despite the regular battles that occur between everyone, and the bloody arguments that occur with each other. Even though Ink struggles with the reality of Error carelessly destroying the things he adores, even though Error finds trouble understanding Ink half the time. They love one another, wholly, but how much they're willing to express it is debatable.
After a moment's thought, something clicked. Furious and curious, the two now have to work out an unfamiliar concept with an equally unfamiliar companion.
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Dust scared you. He scared you more than all the rest of his team put together. That being said, you were going to help him through this little mishap even if it killed you.
Series
- Part 2 of Turned Into An Animal (Sentence Prompts)
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You'd never expected to be one of those people who bonded with a random stray, and if you did, you never expected it to turn out like this. The tiny... blob of an animal was cute, affectionate, and melted your heart before you'd even named him. Unfortunately, not everything is as it seems. You've met this lovely creature before, and he definitely remembers you...
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Far From Home by Hjs_artz
Fandoms: Multi-Fandom, Undertale (Video Game), Poppy Playtime (Video Game), Amanda the Adventurer (Video Games), The Amazing Digital Circus (Web Series), Five Nights at Freddy's
15 Oct 2025
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When the reader looses control of their abilities, it causes portals or rifts to split reality, resulting in them to be thrown into new places with new people. Will they be able to return home, or are they going to be forever trapped? Only time will tell.
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Dust wants to run away but Nightmare notice his shift of mood