1 - 20 of 41,347 Works in Sans (Undertale)
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You, dear reader, have been transported into your own AU — as Sans.
Just when you’d begun to settle into this new, bone-white life, one small mistake sends everything spiraling.A malfunctioning machine, a flash of blinding light, and suddenly you’re falling through worlds — each one a reflection of stories you once imagined, and others you never dared to write.
Gaster calls it an experiment. Papyrus calls it an accident.
But Sans — your Sans — knows it’s something deeper.Every jump takes you further from home, and closer to the truth behind the tether binding your souls.
Will you find your way back… or lose yourself to the story you created?Whatever happens — the worlds will never be the same now that you are part of them.
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The Skeleton brothers find a new... companion. He's a lot of work, but it's worth it.
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Nightmare can't hide it anymore... Killer remembers their first kiss and the next big step is on the way
Series
- Part 2 of Our Little Loves, For Good or For Bad
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“Tell us what’s going on, and maybe you'll live.” He all but mutters at you, jaw clenched.
The lack of eyelights unnerves you a little, you can't tell where he's looking or what he's feeling.
You let out a huff, more akin to a laugh as you roll your eyes. “Have you not been here for the last few months? Were you that dead to the world or are you just stupid?” You bite. “We're in the middle of a fucking zombie apocalypse if you couldn't tell. And you're clearly infected.”
-----The world went to shit months ago. Zombies everywhere, a lack of any survivors, and food a luxury you're lucky to have scraps of. The spoiled magic leaks from the eyes of the (technically) undead and you count your luck stars that you're blessed with no magic innateness.
With little choice, you're stuck with the people who could get you killed the easiest. And you're not sure why you're enjoying their company so much.- Language:
- English
- Words:
- 2,610
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 7
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Cross has been watching you for a while now. Really, the only thing he could do now that Nightmare had called a truce with the Star Sanses. He’s getting real sick and tired of how little you take care of yourself. When you catch a rather nasty cold due to your carelessness, he finally snaps.
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Frisk hadn't exactly intended to fall, and certainly not the way that they did. They weren't exactly opposed to dissapearing, as they'd heard could happen on the mountain, but now that they knew where the kids all went they felt a little overwelmed, and alone. Maybe it was a mistake to climb mount Ebott. But then they meet people, monsters, nice ones that care more about them than the people on the surface. Maybe dissapearing was better than they thought.
I just wanted to have some fun and rewrite the events of undertale with more emphasis on Frisk and what led them to the mountain in the first place. I'm just trying to have some fun writing. Also I make Frisk non-binary in this.
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Unavoidable Outcomes by Crystalight532
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
12 Nov 2025
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The Multiverse isn't as unreachable as one might think. Sometimes, all it takes is one aware person to tip the scales for another to find out about it. But when one isn't ready for it, returning to their own world is relieving and best for the psyche.
Humanity's thirst for knowledge is near insatiable. How far would they be willing to go to learn more about their new magical coinhabitants on the surface? How far would they go if they could weaponise their magic?
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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? -
Mamamangoverse Memes and Incorrect Quotes by Mamamango123
Fandoms: Hazbin Hotel (Cartoon), Murder Drones (Web Series), Five Nights at Freddy's, Deltarune (Video Game)
12 Nov 2025
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So yeah, I just thought of these and thought it'd be funny
Series
- Part 11 of The Mamamango verse
- Part 5 of Mamamangoverse miscellaneous fics
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Your roommate is… weird.
He likes spaghetti and glitter (mixed together, preferably), has a penchant for speaking about himself in the third person, sets up puzzles in the hallway every weekend, and he has begrudgingly befriended your dog.
Also, he's kind of a superhero.
Series
- Part 1 of unnamed undertale superhero au
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Glitch of Hope by Blueberrywriter10
Fandoms: Shipwrecked | Shipwrecked 64 (Video Game), Undertale (Video Game), Undertale Multiverse - Fandom
12 Nov 2025
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Bucky had thought he wouldn't ever get out of that nightmare of a place. He thought he was going to be trapped there for eternity, that his friends were gonna be stuck there suffering...
Then someone new showed up and changed everything.
Series
- Part 22 of Undertale au fics
- Language:
- English
- Words:
- 1,941
- Chapters:
- 1/1
- Hits:
- 10
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You are a hopeless romantic.
So you’re absolutely giddy with delight when you find your soulmate. Your perfect half. Your fated match.
So you try to convince yourself that he’s not pulling away from you, that he just needs to adjust to your level of loving someone. But after weeks of being ignored and neglected, you can’t help but feel rejected.
So when you meet your soulmates lookalike who keeps showing you all this attention, you can’t help but feel confused, and a little bit flattered. You feel guilty for spending more time around this lookalike, but it’s not like your soulmate would even notice.
Would he?
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Ship Children asks and dares by iamauthor979
Fandoms: Murder Drones (Web Series), The Amazing Digital Circus (Web Series), Undertale (Video Game), Incredibox (Video Game)
12 Nov 2025
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A fic where you can ask any of my ship kids questions and dare them to do things. 100% SFW because every ship kid's a minor.
TADC and Murder Drones are there from the start. If you're here for the Undertale AU, skip to Chapter 31. If you're here for Sprunki, skip to chapter 82.
Series
- Part 3 of My TADC Ship Children and their Journey
- Part 1 of Ace's life story (Nuzi ship kid)
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“Since you left…Things have gotten really strange.”
Papyrus is cracking under the pressure of being king, and Sans is busy reminiscing of how much better things could have been.
The aftermath of the King Papyrus neutral ending.
- Language:
- English
- Words:
- 1,471
- Chapters:
- 1/1
- Hits:
- 11
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An ill-thought through party in the woods leads to you getting lost with a dead phone and no way to know where you're going. When all seems lost you stumble across a cabin hidden in the dark depths of the surrounding trees. In classic horror movie hero fashion you find yourself entering the creepy house to find more than you bargained for; including quite a few skeletons unearthed from the closet.
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This slice-of-life story follows the Underverse cast in the hell that is a normal high school setting. Together these dumb skeleboys face growing up, puberty, human-monster racism, complicated friendships, those friendships getting even more complicated when they turn into crushes, tests, late-night study sessions, injustice, hangovers, and every other crazy thing that high school tends to bring.
I know this is corny af, I just can’t write summaries.- Language:
- English
- Words:
- 4,980
- Chapters:
- 2/?
- Hits:
- 10
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Kidnapping the Boss and giving him the happy childhood that he deserves by catdemonakatsukigirl
Fandoms: Undertale (Video Game)
11 Nov 2025
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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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You were a sane, normal, and very sane human with modest dreams of making your way in Ebott through hard work, thrifty living, and good manners.
W. D. Gaster was the ruthless head of the Gaster crime family with modest dreams of upending Ebott through magic, science, and murder.
Six months after returning to the city you once fled, you found your ticket to mundanity in a steady job in the Underground. Six seconds after meeting a suspicious human in his territory, Don Gaster found his ticket to power in you.
A tale of two weirdos fighting and falling in love.
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This is a story I’m writing that’ll be a written version of an au I made called PrismTale which was originally just a comic I made to vent but I ended up deciding to continue it (my oc Prism is also a metaphor for self hatred)
Here is a link to part of the comic in case you’re interested
https://www.tumblr.com/dreamsave/784575599740141568/prismtale-prologue-an-au-i-made-to-vent
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I wrote the Papyrus sickfic I wanted to read, and now I have magnanimously published it.
✨️you are welcome✨️
Also known as: that time Sans and Papyrus accidentally swap magic and therefore magic ailments, neither of them have a great time dealing with the other's issues but at least they can help each other out? They may have to have an honesty about it.