1 - 20 of 41,207 Works in Sans (Undertale)
Navigation
Listing Works
-
Tags
Summary
Ink has never been a good sleeper. He rolls around and sneaks out of bed and is constantly staring into space with wide eyelights, all while he should be sleeping like a normal monster. So, Error, being the good boyfriend he is, takes him to Sci to get meds. Little does he know, Ink is about to screw everything up and put him through the consequences.
-
Tags
Summary
Dream, un prince de quinze ans.
Killer, un tueur de quinze ans.
Un amour dit interdit.! warning! âmes sensible s'abstenir, se ne sera pas un happy ending.
_______
Écrit pour le concours de AmiraAmie0 (wattpad)- Language:
- Français
- Words:
- 3,545
- Chapters:
- 4/4
- Hits:
- 14
-
The Darkness of Creation: Can't Be Erased by Mysterie
Fandoms: Undertale, Disney - Fandom, Marvel, Teenage Mutant Ninja Turtles, Cuphead - Fandom, Dick Tracy - Fandom, Halloween (Movies), The Legend of Spyro (Video Games 2006-2009), Spyro the Dragon (Video Games 1998-2005), Pokemon - Fandom, Deltarune, Bendy and the Ink Machine
25 Oct 2025
Tags
Summary
Halloween gives rise to something the whole of Earth is not ready to face...
-
Tags
Summary
In the timeline with the happiest possible ending, the heroes of the Delta Rune get to live the rest of their lives in peace and harmony!
Or at least they would if they, and the rest of Hometown, weren’t a load of weirdos. These are just some episodes in the irregular and sometimes stupid lives of the heroes of prophecy and their families! -
Tags
Summary
IT'S THAT TIME OF THE YEAR!
Kinktober time~!So yeh this is basically short drabbles of smut. Some will be longer, some will be shorter but I'm gonna try my best to make them juicy~
--------------------------------------------------------------------------------
-
Tags
Summary
The thing about soulmates is, no matter what pries them apart, they always...always find a way back together
Chapters 1-3: Prologue
Chapters 4+: Main Story
*This is a rewrite of I Have The Power of Gaster AND Anime On My Side. Same concept, with a bit of a serious feel.*
**Please be aware that this is not like my usual reader-inserts!! This story is in 3rd person pov, very vague description of a female reader. Unnamed (Pet names only). No use of y/n, y/e/c etc.**
-
Tags
Summary
So, I heard you like skeletons...
Reader insert prompt fills for @skeletonh0e's sans-centric Kinktober challenge on tumblr
-
Tags
Summary
Eh, this year Undertale has gained a bit of popularity again, thanks to Deltarune Chapter 3–4 and the 10th anniversary. So here’s my personal AU.
Series
- Part 1 of My au situation
- Language:
- English
- Words:
- 852
- Chapters:
- 1/1
- Hits:
- 6
-
Tags
Summary
Long ago, deep in the quiet woods of the Underground, Grillby sought only solitude. He never expected to find a fallen human woman-wounded, frightened, and far from home. Against his better judgment, he took her in. At first, it was duty that kept her hidden and safe from the Royal Guard. But when her laughter began to fill the spaces between his silences, protection became something deeper.
When word of her existence spread, Grillby made a dangerous choice: he marked her under his protection, binding her fate to his flame. Their bond grew-slowly, tenderly-but like the flowers she loved, her life bloomed briefly. And then it ended, leaving only memories and ash.
Centuries later, on the Surface, Grillby runs a quiet bar and tells himself he’s content. That is, until a new regular walks through the door - a woman with the same gentle voice, the same curious eyes. There’s something achingly familiar about her, like a dream half-remembered. His flame stirs, warmer than it’s been in ages.
But can love reignite across lifetimes? -
Tags
Summary
You had been playing an immersive VR game: The World Of Aspenheim. However, after 10 years, the servers were about to close and to give your last farewells, you decided to stay online until the servers kicked you out. In the end, you fell asleep on the golden throne...
Only to wake up still logged into the game!? And why couldn't you log out!? And who was the one knocking on the door!?
"YOUR HIGHNESS? ARE YOU AWAKE?"
-
Tags
Summary
You, the reader, in this case Bea, are obsessed with Undertale, and a short skeleton. But once the monsters break the barrier and publicity spreads of their arrival, it's suddenly pertinent to keep the monsters from ever finding out that their lives were a video game. You still play the game avidly, despite the unknown effects; however, when a certain pair of skeletons become your roommates, you discover pretty disturbing things about the game you're playing. However, will you keep playing the game under wraps in hopes Sans will never find out? Or will you be forced to give it up?
-
Tags
Summary
Sans has seen it all. Every reset, every route, every ending. The world keeps turning back on itself, and he's the only one who remembers. While others laugh, dream, and fight like it's the first time, he carries the burden of knowing it isn't the first time.
With each familiar face and every repeated moment, he begins to wonder if only this time would be different. His hope keeps growing and shrinking every time. Maybe the human chooses kindness. Maybe his brother's smile will stay safe. Or maybe it's just another game he's destined to lose. Still, he keeps going, for his brother, for the chance that maybe, just maybe, this path leades somewhere else.
-
Tags
Summary
Life is monotonous and dull, but it’s okay. You’re fine.
Assignment after assignment, test after test, meaningless conversation after meaningless conversation. It fills the void like a flitting firefly in the smoggy night sky, a brief flash of light— followed by an endless expanse of nothingness.
That’s okay. You’ve grown accustomed to it like a goldfish stuck in a glass bowl. You swim, back and forth, over and over and over again until you can’t anymore. It keeps you occupied, distracts you from your lonely, miserable existence.
Until you meet someone who simultaneously fills the void, and drags you so much deeper into it.
—————————————————————————-
Underfell Sans x ReaderA story about the woes of young adulthood. Includes themes of abusive relationships, inappropriate age gaps, mental illness, and substance abuse.
- Language:
- English
- Words:
- 11,051
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 24
-
Tags
Summary
_.;⊛;._
Após serem trancafiados em um subsolo completamente desconhecido e repleto de mistérios e abismos perigosos, os monstros puderam finalmente sentir o gosto da paz. Porém, para os humanos, a herança da guerra se manteve e espalhou-se por toda a superfície, graças à ganância dos reis, trazendo morte e destruição para os mais fracos.Frisk, uma pobre criança assolada pela guerra em que nasceu, fora obrigada a fugir de seu vilarejo destruído para o Monte Ebott, mas, por causa de um descuido - ou talvez obra do destino-, teve sua história ligada às dos monstros e de seu passado.
Sua vida nas mãos daqueles que juraram vingança à sua espécie. Como tudo se desenrolará no fim?
_.;⊛;._
"✞⚐👍☜ ☠✌⚐ 🏱⚐👎☜ ☞🕆☝✋☼ 👎⚐ 💧☜🕆 👎☜💧❄✋☠⚐"
"Jamais..."Obs cronológica: Esse universo alternativo se passa antes de Lewstale (uma outra au minha) e os personagens que nela aparecem ainda não tiveram contato com nenhuma au.
_.;⊛;._
Universo alternativo de Undertale (by Toby Fox)
As capas dessa história, tal como a história em si é de minha autoria. Tenha uma boa leitura. :)
_.;⊛;._
- Language:
- Português brasileiro
- Words:
- 36,816
- Chapters:
- 3/11
- Hits:
- 17
-
Tags
Summary
The Barrier has been broken for over four years.
Monsters were forced to leave Ebott Province, dispersing and wandering until Calloway City takes steps to help. Now monsters have a place where they can find jobs, try to make a living, and really enjoy their freedom.
But humans don’t change much.Brenda is a typical office worker who enjoys genuinely good coffee. She's not the sort to take sides, advocate, politic, or take risks; but being average won't protect her.
-
Dualtale AU: Two sides of truth by ED_Soul
Fandoms: Undertale (Video Game), Underverse (webcomic)
25 Oct 2025
Tags
Summary
Description:
This story is based on the distant and little-known Dualtale AU,where nothing is as simple as it seems. In this world, unlike the original Undertale, monsters were never trapped underground. But what was the price for peace between humans and monsters? And how is it connected to XGaster, when these events unfolded long before the X-Event?
(Features characters from Underverse and Undertale,adapted for this story.)Author's Note:
In the Dualtale AU,the famous rule "Kill or Be Killed" is replaced by another:
"Speak out, and you will be silenced."
This is a universe built on lies and dark secrets that everyone holds.Every character has their own agenda and their own rules and it's better not to try and learn them.Series
- Part 1 of Dualtale AU: Two sides of truth
-
A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
25 Oct 2025
Tags
Summary
Years pass. People grow. The world moves on without you. The Angel grew content with that for a while. It still hurt whenever they thought of the world that had long banished them, but something new pulled them out of the depths. Now, the Angel walks amongst friends who swear that they will not be banished. Kris, Susie, and Ralsei mean everything to them. Maybe this time, their banishment doesn't have to be as set in stone as they thought.
The Roaring comes. The light falters. Everyone falls.
A desperate connection is established in an attempt to save what remains of the Angel. If they fall, all hope will be lost. The world that banished the Angel long ago has forgotten them, but they have not forgotten it. This connection will have to be enough. Even if the rules have changed irrevocably, the Angel's one goal remains the same: Find them.
Series
- Part 2 of Clawing Toward What Hope Remains
-
Tags
Summary
Killer is an average, gender-conflicted "woman" living her life in early 1950s Boston, dreaming of something more interesting and searching for her "One" until one day, a close friend reveals his secret and suddenly her life changes in an impossible way.
-
Timeless Justice by TheDoctorWD
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
25 Oct 2025
Tags
Summary
After countless resets and endless repetition.. something has changed. The timeline has began shifting, changing its path for the first time in a long time. A new path Flowey hasn't seen before.
Well, it might take Clover longer to reach Asgore but Flowey has all the time in the world after all. And seeing something new finally happen has piqued his curiosity. Drawn in by the unfamiliar, Flowey watches with morbid fascination as Clover is not able to give up his soul this time. Encounters shift, monsters react differently, and the world itself begins to remember things it was never meant to.
Events shuffle. Characters act out of turn. Rooms appear where there were none. And for the first time in countless resets, Flowey doesn't know what comes next. Clover's fate is uncertain. Though Flowey knows he will get those human souls, no matter what.
Series
- Part 1 of Fractureverse - UT/UTY/DR
-
Tags
Summary
It’s cold outside, and Killer, of course, didn’t wear gloves. When he comes back inside, shivering and smug, Cross reluctantly agrees to help him warm up.
[Flufftober - Day 25: Cold Hands]
Series
- Part 62 of Undertale Fics
- Part 72 of One-Shots / Two-Shots
- Part 10 of Prompt Fics
