1 - 20 of 41,374 Works in Sans (Undertale)
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Getting caught into Nightmare's grasp, Cape has no other choice but to survive, finding strategies to make their journey into this castle less horrible.
Used as a negative battery, a maid and a worn out toy for the three other skeletons to play with, Cape can't do anything but comply. But something's off. In fact, despite of all those psyhological torture to make them submissive, Nightmare seems pretty reluctant at the idea of them being hurt physically. And Cape knows that it's not by kindness of heart. But they are far from imagining what they were meant to. And that's what they will have to find out before geeting a chance to escape.
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
15 Nov 2025
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It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-life crossover AU.
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Mettaton and Muffet become the king and queen of the Underground after Asgore's tragic death. Will they do a good job or is the power getting to their heads?
This was originally supposed to be an AU so if it doesn't follow the timeline perfectly or characters act different, that's why.
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Frisk Gets Adopted By A Skeleton (UnderAdoption/AdoptionTale) by Cat_On_A_Keyboard, CheerfulForest
Fandoms: Undertale (Video Game)
15 Nov 2025
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Sans lives alone with his baby brother in an old house on the outskirts of New Home. He raises him to the best of his abilities. One day, he hears the doorbell ring. He opens it and finds an abandoned child. A human child. He has no idea how they got there. The only thing left with the child was a note. Sans reads the note and learns the orphan's name. Frisk.
Series
- Part 1 of Frisk Raised In The Underground
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A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
15 Nov 2025
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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
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Three years ago, a brother left his sister to search a mountain that no human has ever returned from.
Three years later, the sister, desperate for answers, follows her brother's footsteps.
The two meet again, but the result is likely the most hectic two weeks of their lives. And one of them has already lived an eventful life.
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After the battle, you look at your hands... why did I became a skeleton? by Quinme
Fandoms: Undertale (Video Game)
15 Nov 2025
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Your dear friend Reishu was in danger, she suddenly got attacked by a mysterious skeleton in a black and white, who carries a big blade on his back. In this fight you truly did your best to protect her, giving it all your efforts.
After a long battle, you lay on the ground, defeated and hurt, the only thing that's is on your mind is the fact that you managed to buy some time for your friend. That you did good.
The unknown skeleton lean closer to you, saying something, but you hear none of that, refusing to listen the words of the enemy. Despite it feeling like the end, you wish to do something before taking your last breath. You haven't used your magic for the past ten years because of how messed up it got after your father passed away, but now you do not care about messing up. With the last effort, you do your best in attempt to take this guy with you. Reaching for your soul, you use a spell to end this, to take rid of this intruder!
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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)
15 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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Susie and Noelle are interrupted on their Festival date when they stumble upon a Dark World in Asgore's flower shop, Kris and Catti follow them inside. Though their adventure starts out innocent, sinister truths about the world and its history come to light.
As Alvin picks up where his father left off, the Fun Gang ventures into the world of darker than darker than dark. A grand conspiracy unravels, and Susie's hope shines bright into a new future.
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A Human Has Fallen From The Surface World (how was the fall?) by literallybk
Fandoms: Undertale (Video Game)
15 Nov 2025
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Sans puts up posters across town to get a hot girl in his bed so he can see his brother’s new room -
[FULLY started and written as a joke.
I decided to post on here instead of it sitting around.
I’m unsure if I should finish this and how I would even finish it if I did.. I completely forgot about this until now.
I skimmed over it and didn’t check grammar so it might be bad. Sorry for everything in advance lol. ]- Language:
- English
- Words:
- 2,153
- Chapters:
- 6/?
- Hits:
- 18
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A field filled with dust and dried blood. A field where the last words and cries for help were drowned by the hits of sword blades.
The war between monsters and humans is underway. Started with fear and a feeling of insecurity, and it could end in any way. Both sides having only one goal: to save their home, from people they once called their friends.
Two sides, one winner and no matter the cost.
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They say writing letters can help. Sometimes, just getting the words down on a page and out of your head can bring people catharsis. It may allow them a chance to somewhat come to terms and heal from the grief that won't leave them.
Ink doesn't understand it. But what the hell, he might as well try.
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"Copies are monochrome", as one would say. Though I like mine in colour so they look prettier.
This isn't your average oc lore, and not everything goes as planned. At least, that's what they think. Some would also say.. it's all going according to the script.
- Language:
- English
- Words:
- 1,972
- Chapters:
- 2/?
- Hits:
- 2
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Summary
Killer fucked up, and oh boy, Nightmare is PISSED. Killer will have to deal with Nightmare's punishment and keep going forward despite losing all hope.
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Nightmare sends Killer to the Anti-Void, house of the crazy destroyer of universes, as a punishment, and Killer has to survive and, most importantly, get out of there as soon as possible... or not. -
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Summary
This is a human Afterdeath werewolf au. The main ship is Afterdeath. But there is some implied Science x Geno, Errink, Cream, Kreme, ScienRed, Dustberry, Crossmare, Killermare Horror x Dust at some point. This is a slow burn, but it will eventually have smut.
Warnings: This first chapter has extreme violence and torture in the beginning, including some implied non-con. There will likely be death and other forms of violence throughout the story.
Fully covered in a black cloak. Everything around him seemed like darkness and death, just like the masked man. He could only see his mouth, which was unexpressive. He looks almost ancient. Frisk trembled slightly, bowing to him while Geno could only stare slightly before avoiding his eyes and walking past. The cloaked man stopped.
"You're looking better." The man's voice was deep and almost soothing, at least to him. They continued to walk, and Frisk glanced at him as they continued on their way. They walked in silence until the others were out of earshot.
"Who was that?" He asked, and she trembled slightly.
"H-he-" she cleared her throat, "he's the judge, and…he was the one who found you."
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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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Rather than the selectively mute child who let things flow without any thought of disturbing the pre-established script, it was the mafia boss (in training) who descended to the UNDERGROUND instead.
And Sawada Tsunayoshi never like it when someone tried to chain his will down like a mere puppet.
Series
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Nightmare's gang always knew their job was risky, but they never expected to actually die.
Then Killer was killed.
Nightmare found a replacement quickly enough, but this new Killer isn't the same as the old one, and the gang are having a hard time adjusting.Inspired by a comic by darkxsoulzyxcaliberx. A huge thank you to my bestie and partner for beta reading.
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Half-Tale: The Fallen by HolmesJaw
Fandoms: Undertale (Video Game), Half-Life (Video Games)
15 Nov 2025
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Corporal Adrian Shephard, a US Marine Corps soldier assigned to the HECU division, was sent off to Black Mesa for 'cleanup duty'. Despite the hell he went through, the marine somehow manages to escape the dangerous, alien-ridden facility against all odds and, after being 'detained' by the ever elusive G-Man, is then assigned a new mission many years later... to the UNDERGROUND!
Accompanied by Chara Dreemurr, the first fallen human turned apparition, the two journey through the unprecedentedly large Underground for one, very specific goal... but what exactly was it? And is that all there is to it?
In... time, all will be revealed.
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In the shadowed halls of a cursed castle, Prince Nightmare and his loyal knight, Cross, share stolen moments of intimacy.
[Novembmare - Day 15: Knight]
Series
- Part 83 of Undertale Fics
- Part 93 of One-Shots / Two-Shots
- Part 30 of Prompt Fics
- Part 15 of Undertale Fandom Event fics