1 - 20 of 42,256 Works in Sans (Undertale)
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Long ago on the surface as the light of the sun gave protection. Humans and monsters live in peace and humility side by side, as days pass and the small village starts to advance. A sickness struck, humans baffled by this as they struggled to find a reason why as the ill became fatalities. The odd part as none of the monsters became sick, anger on one side bled into the other when an irredeemable action was made and war started. irreversible damage on both sides as it escalated. The Queen of Monsters as a last resort tried to plead mercy with humans of the village. After the case was solved, they agreed with the monsters being sealed down.
Tragedy struck monsterkind, the King of Monster declared war on humankind with the goal of getting 7 human souls. With the disappearances, humans fought back and with the amount of lives lost, the ones with the strongest [DETERMINATION] able to be contained.
Years later the war was forgotten as civilization advanced. The missing cases caused in MT. Ebott made them put up warning signs warning anyone from venturing into it as a way of preventing. -
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*SPOILERS TO AT THEIR MERCY. THIS IS A SEQUEL*
The multiverse was finally at peace, and Erratum felt as though they were finally able to breathe a sigh of relief as the peace lasted over a year.
They knew better, deep down, than to believe it would last. The itching voice in the back of their mind assured them that this was far from over, at least.
Discord is constantly breaking the link for the ATM discord but: https://discord.gg/DgHWGnMNrs
*EDIT: My server got raided twice, please message for a link request, lol*Series
- Part 2 of ATM Multiverse
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The Seven (Plus Chara) have done it; they've ended the imprisonment of all monsters. With Frisk as their ambassador (and Papyrus as mascot), things are sure looking up!
But in the background, things are at play, events that could threaten everyone's happy ending.
After all, just because one story ends it does not mean the Tale has.
Series
- Part 2 of Hall of the Seven
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The Lost Fire/Asgore fic by File404
Fandoms: Deltarune (Video Game), Undertale (Video Game)
20 Feb 2026
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Asgore from deltarune is remembering memories of Undertale
- Language:
- English
- Words:
- 573
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 1
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Sans trudges through the snow, the cold water getting into his slippers. A light snowstorm also somewhat blurs his vision.
But that’s not important. He needs to find Papyrus. That’s why he’s here right now.
A choose-your-own-adventure dusttale encounter between Sans and Papyrus, with an interesting twist.
There are 10 endings to be found. Can you get them all? Probably yes.
Multiple routes may lead to the same outcome, however.- Language:
- English
- Words:
- 2,497
- Chapters:
- 30/30
- Hits:
- 11
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Riot hates the humans. They're racist, bigoted, idiots. The monsters have tried being friendly, but the humans didn't seem to care. Something needs to be done to change things. Riot decides to be that change. Since the humans want to call him a demon, then that's what he'll be.
Frisk is sad that their friend has decided to forgo peace. They make a stand. It's not enough. Not when they aren't even really DETERMINED to stop him.
The humans thought they could get away with treating the monsters terribly. They were mistaken.
Series
- Part 6 of INFLUENCE
- Language:
- English
- Words:
- 5,736
- Chapters:
- 3/3
- Hits:
- 35
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Red wakes up in an AU that's not his own. After being taken in by Sans, his adventure begins. Drama, violence, silly insults, actual serious moments, romance, and more!
I don't know what tags to use, so tag suggestions are welcome! -
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The smug-faced ignorant human resets another time. Ofcourse after the uncountable resets sans has been through. He goes through it again. This time the human pulls that stupid trick. Kill all but spare one. But this time the one froggit the human let loose isn't enough for sans to hold back. Sans leaves no more exceptions.
Series
- Part 1 of Sans - - no exceptions
- Language:
- English
- Words:
- 358
- Chapters:
- 1/5
- Hits:
- 2
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Unwilling to kill to claim a soul—or to strike down the monster king to escape—Frisk chooses to stay underground. The monsters crown her their princess, and she grows up among them, a symbol of hope and peace.
But shadows from the past refuse to stay buried.
When the fragile peace begins to crack, Frisk must face what she's tried to forget. Alongside her childhood friend, Sans, she sets out to protect the only home she's ever known—and the people she loves—from a threat that spans timelines.
With original art. Inspired by Seventh Soul by 8TheKat
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What happens when a story creates its own plot? A script written out of control, or rather in its own control? The writer who held the pencil being absent, so the pencil starts moving on its own.
Ink wondered that, as the God of Creation. Everything in this multiverse was his. Except for a few things, but... that's not important!
What would happen if he lost hold of it, he thought.
Upon realizing Dream has been absent for 500 years, Ink realizes this what-if might be his reality, just by a tiny bit.
He thought he'd despise such a thing. So then, why is everything about this so enthralling, then? Enjoyable?
Why does he, the universe, love this out of control star?
Connected to the ask-fgod tumblr blog's lore.
Series
- Part 1 of @Ask-FGOD Works
- Language:
- English
- Words:
- 5,315
- Chapters:
- 1/3
- Kudos:
- 2
- Hits:
- 15
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Create-tale, an unknown location in the empty space of the multiverse that separates Doodle Sohere from the Antivoid. Who would have thought that the locals of both places would be in charge of the most important possession in the multiverse?
The world of the creators, powerful souls who follow these guardians and venerate them as warriors. However, that security would be relegated to the background by human curiosity and its fragile life. After all, they aren't fictional like the creations. Or rather, their creations.
This story contains sensitive content such as graphic and violent descriptions, and topics such as death, abuse, and others. It is intended as a horror story, Discretion and no romanticization are recommended.)
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Gin has died leaving ink alone in the multiverse. Error starts destroying aus and ink has to figure out how to stop him which leads to complications
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Under and Over and Over and Under by Tr41n1ng_Wh33ls
Fandoms: In Stars And Time (Video Game), Undertale (Video Game)
20 Feb 2026
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Having been trapped for a few-too-many loops, Siffrin started to feel like nothing was going to change in their never ending play. How were they supposed to predict that the universe would put something so large to block their path to freedom? Literally?
'Something' the size of a mountain.
Literally.
Most would argue that the only way to go once you've hit rock bottom is up, but Siffrin would argue that you can always dig down. Underground, even.
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An In Stars and Time and Undertale crossover!
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A child with nowhere to go escapes the Underground at great effort, greater cost, and several missteps. Wandering the Surface, alone but for the undead voice in their head, they determine that the ending they have reached is not the one they want, and set out to find a better one. Rather than trust the advice of Flowey, they instead place their faith in the king’s dying words and seek the truth on the Surface. Somewhere in the world, there has to be a way to free monsterkind, and they’ll find it or die trying— And dying hasn’t stopped them yet.
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Dream fancies a trip to his garden.
And blows up.
Series
- Part 2 of Reader's Kingdom
- Language:
- English
- Words:
- 3,224
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 11
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So, I don’t like how little stories there are of Ink having a mental breakdown. So I wrote him having a mental breakdown.
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Ink is laying on the ground. How did here. Why is he here?
He should get up.
He should go to work.
—
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After the pacifist ending of Undertale, the monsters arrive in the surface to find a human kingdom. In this medieval AU, Sans and (The reader) Princess Rosaline fall in love.
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Standing alone at the end, A sentry for the royal guard prepares to pass judgement. He knows he needs to win every single time. They only need to win once.
(Inspired by 'How do you KILL a time traveller' on youtube)- Language:
- English
- Words:
- 3,954
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 18
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His Kitten has just settled in and Nightmare already is about to take in another one.
Good thing this one's a teddybear. Literally.
Series
- Part 2 of Finders Keepers
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'Dating' the radio demon by Djpicklsbro
Fandoms: Hazbin Hotel (Cartoon), EPIC - Jorge Rivera-Herrans (Albums), Pirates of the Caribbean (Movies)
20 Feb 2026
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Summary
After Alexander Hamilton stole Lilith's love and usurped his throne at hella high Lucifer is left a broken dejected man. Will he be able to find love with someone else amd regain his title as the rightful ruler?