1 - 20 of 43,160 Works in Sans (Undertale)
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Summary
Escaping humanity isn't something everyone thinks about, much less wish for- but the fae realm is notorious for allowing those who wish for safety into its mysterious home.
You're going to find yourself anew, rebirthed into the fae realm with more power then you assume at your finger-tips. Hopefully you realise sooner rather then later how much power you hold at your finger tips.
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This is a bad sans reverse harem fic, whilst MC is an oc of mine, it can 100% be read as a reader-insert fic.
Bad Sanses - Nightmare, Horror, Dust, Killer, Cross and Error.
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Original Faeu belongs to Valrayne-faeu on tumblr!
- I've made a few changes to the Faeu, so please keep aware of that and the tags. -
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Summary
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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A retelling of undertale, except Frisk is older, everyone has a giant cock, tits, and booty, and I get to write it. Lemme know what you think! I wrote this in 3 hours at 1 in the morning. Also, Frisk uses they/them in this because if I'm gonna shapeshift em anyway, might as well make them an enby
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You were a normal human. You went to college, you had a life, friends, family, etc. Apparently, the void didn’t care much for happy endings, and you find yourself strapped to a table in an underground lab.
It’s fine, you have plot armor.
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Or, you get sucked into the void and your soul is placed in the body of eight-year-old Sans.
Arc 1: Heritage (1-7)
Arc 2: Hell (8-10)
Arc 3: Home (11-45)
Arc 4: Heart (46-59)
Arc 5: Hostage (60-76)
Arc 6: Home [Reprise] (77-90)Series
- Part 1 of How To Be A Human Being
- Part 1 of Hounds Of Love
- Part 1 of I/Me/Myself
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It’s been years since you’ve spoken to your old monster friends, it’s not your fault though…. right? At least you don’t think so, you were just defending yourself, it hurt for a while, but your better now, you don’t need those numb skulls anyway!
…SO WHY THE HELL DID THEY COME BACK WITH DUPLICATES???
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It’s official, Mages were to be sent to the Underground, deemed too dangerous for both Human and Monsters.
You could only stand there, hands tightly clenched on your duffel bag strap as the scene unfolded before you. They shot him… right in front of his kid… the poor boy screaming and crying as he hugged the cold corpse of his father.
You heard someone faintly call your name, but you just couldn’t move…
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Letter never wanted this...but there's no turning back...
- Language:
- English
- Words:
- 537
- Chapters:
- 3/?
- Hits:
- 4
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“Sorry.” Kris spoke, automatically.
Asgore, ever kind, doesn’t care at all. “It is no matter. Did I remind you of your father?”
Kris nodded, turning back to the flowers, and patting the ground in a silent invitation, “You sound like him. It caught me off guard.”
Series
- Part 2 of Deltarune
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Summary
The strong nuclear force is defined as the strongest of the four fundamental forces of nature. It is the force that binds protons to neutrons inside of an atomic nucleus. On the quantum level, it also binds quarks of similar charge and direction together in order to form protons and neutrons.
The summer after her graduation from undergrad with dual degrees in biotechnology and theoretical physics, the world around Vera Jefferson changed. An entire new race of people poured out of Mt. Ebott, the namesake for her university. The monsters that now populated the militarized zone around the campus and base of the mountain were strange, but kind. Having made quick friends with the sarcastic bartender/owner of the restaurant across the back alley from her apartment, it seemed as though her world had changed for the better.
Once she starts the first semester of her PhD, she realizes just how true that is when she meets some of the other monsters around campus. Life may not be easy, but with the help of the people she went through undergrad with and her new friends from underground, she feels for the first time that she just might make it through.
Series
- Part 1 of Majoring in the Soul
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Summary
Sans tries a new strategy to save the underground from the being trying to wipe out all of monsterkind. This backfires tremendously when a human from the real world (who doesn’t even know about Undertale) gets transported into his universe. Will this result in friendship, a game of cat and mouse…or The Absolute?
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When Kris encounters their mother and the guy from the convenience store, something different than usual happens...
The player decides to fight Sans Undertale after they see what happened in Kris's living room.
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I Can't Save You. - Oneshot by Blank_T137
Fandoms: Undertaleau - Fandom, dreamswap - Fandom, Undertale
24 Mar 2026
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- Language:
- English
- Words:
- 201
- Chapters:
- 1/1
- Hits:
- 3
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soulnapped red soul by Blastking3080
Fandoms: Undertale (Video Game), Deltarune (Video Game)
24 Mar 2026
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Summary
A thought I had a while back so here it is
- Language:
- English
- Words:
- 242
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 25
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Woventale - Shorts by Op7
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Alternate - Fandom
24 Mar 2026
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Summary
In Woventale, the Underground is a patchwork of strange cities and altered destinies, where familiar faces walk unfamiliar paths. Across the stitched landscapes of Snowfall, Sea Shore, Smokestack, and the Forest Ruins, lives intersect in quiet, calm, or sometimes dangerous, and unexpected ways.
This is the world woven by 'Watchers'. Like you. So why not stay awhile, and listen?
This - is not a grand story. This is a collection of short stories, moments, scenes and encounters.
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What awaits the monsters that once resided in the Underground when they emerge to the surface?
- Language:
- English
- Words:
- 1,544
- Chapters:
- 1/?
- Hits:
- 2
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The Purest Soul 💙 by Sinsational_Sinnabon for merrinbrite
Fandoms: Undertale (Video Game)
24 Mar 2026
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Summary
The leader of the human province and head mage, Cadoc, has no qualms in letting anyone willing to listen know that his third daughter—an unassuming girl with a deep blue Soul—has the most powerful magic known to mankind. She's able to perform feats that would make the entire monster kingdom tremble in fear. She may even have enough magical prowess to tip the scales of power between the already tentatively peaceful neighbors.
Reluctant to violence, but hand forced with the protection of his recently unearthed populous, King Asgore levels the humans with an offer. Hand over this Blue mage to be paired with his Son, in a show of unity between their nations. Eager to breach the tall walls of their secret kingdom for information, Cadoc agrees.
Unbeknownst to all, there's a third party at play, who's been intently watching the Head Mage's daughter as she spends her time in the meadow between their lands. She's nothing like everyone says she is... and soon he finds he's fallen for her—hard.
When the Prince agrees to switch places with him for the courtship ritual, her secret admirer will have to win her heart, and Soul, sight unseen. But can they both keep pretending to be someone they're not?
Series
- Part 5 of The Butterfly Effect 💚💛🧡💜💙🩵❤️
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Do it again. by Hnalianot
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, Undertale (Video Game)
24 Mar 2026
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Summary
Is it worth it to sacrifice yourself for someone you love?
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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), Little Misfortune (Video Game), Sally Face (Video Games), Kindergarten (Video Games 2017 2019), Tattletail (Video Game), Night In The Woods (Video Game), Cult of the Lamb (Video Game), Fran Bow (Video Game), Baldi's Basics (Video Games), Spooky's Jump Scare Mansion, Celeste (Video Game), Hollow Knight (Video Games), Mr. Hopp's Playhouse (Video Games), The Binding of Isaac (Video Game)
24 Mar 2026
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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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After battling a god-like being, the golden flowers planted a new fear in the monsters' hearts.
The barrier shattered, and the monsters brought wounded human children to the city for treatment, discussing the kingdom's future.
Just as the short skeleton intended to remain uninvolved as always, he encountered an unexpected being.
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This is a story centered on the skeleton bros adopting an OC; I would be happy if it was regarded as a kind of AU.This is a story written with AI assistance and machine translation. For more details, please see the explanation and declaration in Chapter -1.
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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!