1 - 20 of 41,543 Works in Sans (Undertale)
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Listing Works
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Summary
Names, and who's who.
Will be updated if/as new people are mentioned and added.
Series
- Part 1 of Time
- Language:
- English
- Words:
- 48
- Chapters:
- 6/6
- Hits:
- 1
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Summary
A strange fracture in reality has upended your world, landing you in the middle of a snow-laden forest with nothing but questions—and no memories to answer them. The cold bites, yet something deeper unsettles you, a feeling that you weren’t meant to be here. Shadows watch from the trees, and every step only deepens the mystery, leading you to a pair of odd yet oddly familiar figures who claim they found you by chance. As you journey through this bizarre world, fragments of your identity remain just out of reach, and the unsettling sense of belonging—and not belonging—grows ever sharper.
Who are you? And what dragged you here? In a world where even laughter holds a double edge, piecing together the truth might be your only way home, if you have a home to go back to.
(Will Be Fixing Summary)
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Yeah so this is just a bunch of baby fics made up of ideas that strike me at 1am. Not all of these will be finished and the quality will be average at best, but know, I'm trying.
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Several not-related shorts about what Sansta left certain skeletons under the tree.
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Kidnapping the Boss and giving him the happy childhood that he deserves by catdemonakatsukigirl
Fandoms: Undertale (Video Game)
06 Dec 2025
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Summary
When Killer decided to bring some unknown science experiment into the castle, the last thing they expected was time travel. But hey now they have the most adorable baby bones ever, their boss Nightmare who doesn't know who they are and oh yeah is also 5.
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Nightmare takes in a new pet. If Cross would just realize that it was only for his best.
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Some Kind Of Magic by WaggishCape
Fandoms: Undertale (Video Game), Deltarune (Video Game)
06 Dec 2025
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Summary
Well, this is truly how life is in the Underground. You go off with a goal to accomplish one thing, you'll find yourself doing about 100 other things. You save one person, you save a bunch others in the process. Sure, duty is important, but so is having fun, right? Even when the multiverse is at stake?
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This work exists to host entries relating to my project Undersided! These may be continually updated without posting new chapters, as more material is added. I'll add timestamps for each edit to a given chapter.
This work is dedicated to the public domain.
Read Undersided on the website at https://vector-graphics.github.io/undersided/ -
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Summary
[Alone
Loneliness in infinitum
Outliving those around me
Until ende.]Immortal, Nightmare outlives those he hadn't realized he cared for until they were gone. In his grief, he falls asleep, leaving the empty world around him a husk.
When he awakes, nothing is the same and nothing is right. -
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Summary
The first story of the series. Follows our protagonist through his rebirth and until he (re)enters the Multiverse.
In case you couldn't tell I suck at summaries, I'll get better eventually, probably.The Major Character Death Warning is temporary and happens multiple times btw, it is a little confusing at first but you will understand as the story continues.
Prologue: Rootverse's Collapse (1)
Arc 1: Rebirth (2-7)
Arc 2: Meeting Familiar Faces (8-80)
Sub Arc 2.1: The Teeth Incident (20-41)
Sub Arc 2.2: The Magic Incident (42-50)
Sub Arc 2.3: Time For Shopping (51-59)
Intermission: 1st Major Time Skip (60-62)
Sub Arc 2.4: The First Human (63-80)
Arc 3: The Tragedies That Follow (81-?)Series
- Part 1 of Miseries of Metempsychosis
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Five months ago, Mount Ebbott split open and freed an entire population of monsters, who struggle to reintegrate into modern society. At Ebbott University, Babs begins her graduate degree, studying and teaching metal and glasswork to the newly enrolled interspecies student body. She, alongside her closest friend Vera, are unaware of the fight the future holds for them.
This is another fic written in tandem with my bestie Bepandahalf's fic Strong Nuclear Force!! Go read it it's so fuckin good y'all
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I isekaied Chonny Jash into undertale but it’s specifically the jashlings by BadChoccyMilkyyy
Fandoms: Undertale (Video Game), Chonny's Charming Chaos Compendium Vol. 1 - Chonny Jash (Album)
06 Dec 2025
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Summary
You read the title
As I started working on this the mind electric started playing and I tweaked
RRRRRRRRRAAAAAAGGGGGGHHHHHH I LOVE CHONNY JASH
I LOVE THIER MUSIC
If they see this I’d be shocked but if they do HIIIIIIII CHONNY I LIKE YOUR MUSIC :DI wish that one day I can make an album cover for them
- Language:
- English
- Words:
- 675
- Chapters:
- 3/?
- Hits:
- 21
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Este es un AU (universo alternativo) del juego de Undertale.
Frisk una chica, que, para sobrellevar el fallecimiento de su madre, se resguardo en un videojuego que le regala su padre. Así transcurren los años, y así a sus jóvenes dieciocho años, después de comprar la remasterización de su juego favorito, es misteriosamente teletransportada “dentro” del videojuego, no solo viviendo una gran increíble, estresante y cansada aventura, si no que tiene la hermosa posibilidad de conocer a sus personajes favoritos, sobre todo a él príncipe Asriel, quien es el protagonista del mencionado videojuego; pero las cosas no terminan siendo como en el videojuego y Frisk termina conociendo más a fondo a todos los personajes, en especial a cierto esqueleto que no es tan mencionado en el juego, dándose cuenta que ese lugar no es su videojuego, es un mundo completamente diferente y a su vez cambiando el curso de la historia de este mismo.
Esta historia no solo se basa en el viaje de Frisk en regresar a su realidad, si no que dentro de las cosas buenas y malas que le pasaran para lograr este cometido, terminara en un ángulo amoroso con Sans y Asriel.- Language:
- Español
- Words:
- 18,056
- Chapters:
- 10/?
- Hits:
- 10
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Magic Stones (Kidney stones? no.. but you're funny for that) by Certified_Lurker
Fandoms: Undertale (Video Game), Original Work
05 Dec 2025
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Magic sears through my veins, but I am determined to use every advantage I have.
Okay so.. pretty much... you have lore (and trauma).. these silly skeletons somehow get pulled into your universe and you have to find a way to get them home. Lots of action, lots of gay. They are gay for each other and for you.. maybe... at some point.. might take a while.
I do NOT consent for my work to be used for AI: prompts, teaching, character bots, or anything else related to AI.
Undertale belongs to uhhh Toby Fox or something idk..
IF YOU ARE MY FRIEND READING THIS- well howdy seeing you here- JUST PRETEND THIS ISNT ME, I AM A STRANGER TO YOU NOW
- Language:
- English
- Words:
- 986
- Chapters:
- 2/?
- Hits:
- 27
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Weather Report: 100% Chance of Boyfriends by EchoesOfMeliora
Fandoms: Undertale (Video Game)
06 Dec 2025
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When Mettaton accidentally borrows Papyrus’s scarf before rushing onto live television, he doesn’t think twice.
The audience does.
Now the entire Underground knows the Head of the Royal Guard is secretly dating the most dramatic robot alive, Papyrus is being interrogated by his friends, Mettaton is trying to run a show while being asked wildly personal questions, and both of them are wondering how on earth they ended up soft-launching their relationship via a weather segment. -
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Summary
Warning: Heavy sadism, abuse, manipulation, trauma and self harm topics.
Nightmare is living the life. He's got a castle, power, whatever he wants when he wants it. Even if he's got a little ghostly stalker following him.
Unfortunately, his enemies are teaming up, and he can't do everything alone anymore.
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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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Is That a Yes? Underfell Sans x Female Reader by MoondropSunny
Fandoms: Undertale (Video Game)
05 Dec 2025
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Series
- Part 7 of Underverse Oneshots
- Language:
- English
- Words:
- 898
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 41
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Summary
It was hard to leave your old home, the only one you had for so long.
But since you fell, you're life has only been better. People rely on you, people care about you.
Some maybe a little more than others.
You just hope no one blabs to the queen. -
Another Ending by Zekyn
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
05 Dec 2025
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Summary
What if one pivotal moment had gone differently? Chara and Asriel find themselves facing the aftermath of choices that could have ended them both.