1 - 20 of 64,163 Works in Undertale (Video Game)
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Red isn't at his home AU...
theirs no beartraps covered in rust in his Snowdin. nor is their scratch marks covering the base of the trees.
The Portal spit him out at the wrong timeline!Rust with a hint iron is all he smells.
The path crooked and wrong.
This new underground mocks and jeers at him.
Stopping gets rewarded with getting threatened and questioning morals leads to death.
is the stranger friend or foe?Red really needs a drink...
Series
- Part 1 of Bone aches
- Language:
- English
- Words:
- 1,140
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 5
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Summary
Stretch (US!Papyrus) and Mutt (FS!Papyrus) remember their friend saying he'd like to try being submissive. He's too stuck in his ways to ever do it, though, so they take matters into their own hands.
Red (UF!Sans) gets tied up against his will.
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Writing Prompt: Write a letter from an astronaut to their family, justifying why they decided to leave home for a new planet.
Series
- Language:
- English
- Words:
- 97
- Chapters:
- 1/1
- Hits:
- 4
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Summary
They said no one who climbed Mount Ebott ever came back, but you weren’t “no one.” When Y/N falls into the Underground, they awaken a story that’s been repeating for years… one of monsters, souls, and a lazy ass skeleton who’s seen it all before. But this time, something’s different. The resets don’t feel the same. The laughter doesn’t sound the same. And Sans, the lazy, pun-loving sentry, starts to wonder if maybe this is the one timeline worth breaking the rules for.
In a world where everything resets, what happens when someone finally makes him want to stay?
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La realidad no es más que un tejido fino sobre un abismo de estática, y alguien —o algo— ha comenzado a tirar de los hilos.
Tras la aparición de una fractura en el tejido del multiverso, lo que comenzó como una misión de rutina se ha transformado en un descenso a la locura. Mientras los guardianes del orden y el caos intentan mantener una fachada de normalidad, los cimientos de la existencia comienzan a resquebrajarse. Fragmentos de recuerdos, lealtades fracturadas y una conexión prohibida amenazan con borrar la línea que separa la identidad de la aniquilación.
Dream y Nightmare custodian un pacto de silencio que podría salvar —o condenar— a todo lo que existe. Pero en el silencio, algo los observa, y la sincronía que comparten empieza a hacerse notar más allá de su voluntad.
Todo vínculo tiene un precio. Y en un multiverso donde la verdad es el enemigo, la ignorancia es el único refugio que queda.
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:-: DSC!Dreammare :-: Inseparable [Smut] by Anonymous
Fandoms: Undertale (Video Game), Undertale, DreamSwap!Cannibalism AU
22 Jun 2026
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Series
- Part 9 of Dreamswap!Cannibalism AU series
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New places (mafiatale au) Vers 1 by MoonyMatty
Fandoms: Undertale (Video Game), Deltarune (Video Game)
22 Jun 2026
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Summary
Moving home is never easy, especially for you. Why? Because one day you were in the real world and the next you had fallen into the world of a Undertale fanfic you haven't read in years.
Series
- Part 1 of New places (Mafiatale)
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Summary
You were just trying to get home from work on a late night. That was it. However, now you're stuck in a different world, and technically a different body. You try to make your way in this odd world and try to figure out how the hell to get back to your world. That's not such an easy feat when you don't know the first thing about the multiverse or how you even got here in the first place.
It doesn't help that at seemingly every corner, there's a skeleton berating you for something you didn't do. And every time you try to ask what it is that you did, they claim you already know what you did. Whatever it was that 'you' had done, it had to be pretty bad for these monsters to be threatening your life...
What the fuck did you do?
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//Sweammare// Eternity by Anonymous
Fandoms: Undertale (Video Game), Undertale, Undertaleau - Fandom, dreamswap - Fandom
22 Jun 2026
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Series
- Part 1 of Sweammare 18+ Collection
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Summary
List of the Sanses reverted into a child like body. and yes, I said child body. their minds are still the same. really, their just the same, but now weaker.
Ink Sans,
Dream Sans,
Swap Sans,
Swap Papyrus,
Fell Sans,
Fell Papyrus,
Dust Sans,
Killer Sans,
and Nightmare Sans. (who, is brought back to normal. but not really? can you tell I really didn't give this story any thought then the parts I like)
The big bads of the story,
GG Fell Sans,
Corrupted Aftertale Sans, (who, is the whole reason why this story kicks off. and also, my creation. so, yay!)
Xtale Chara,
and Xtale Gaster.
finally, Ships!
Error Sans x Core Frisk and Dream Sans,
Green Sans x Fresh Sans
Horror Sans x Dust Sans,
Past Horror Sans x GG Fell Sans,
Swap Sans x Fell Sans,
Swap Papyrus x Fell Papyrus,
Ink Sans x Nightmare Sans,
Killer Sans x Color Sans,
and Cross Sans x Delta Sans. -
dig up those old bones your young self left behind by xxcyberghostxx
Fandoms: Undertale (Video Game)
21 Jun 2026
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Summary
Nightmare finds a baby and decides to raise it into a murdering machine.
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kissing and hope they caught us (I wanna show you off) by Fishie16 for Meowserling
Fandoms: Undertale (Video Game)
22 Jun 2026
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Summary
There is a price that comes with immortality.
A sense of age that'll never truly come; a lingering knowledge that those you may possibly have affection for will soon melt away at their skin and will become no more–nothing more than a memory that you may eventually forget, clouded over with someone else–someone else who is entirely as temporary as them.
It had only been recently that he learned a new kind of pleasure–one he had always known of course, but never one he himself had thought to indulge in. It felt too intimate. Too standard; too positive.
Or;
Nightmare has three bad (crazy) bitches in his castle. How could he NOT fuck them?
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Summary
Just a whole bunch of incorrect quotes. Tags subjective to change.
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Summary
It had been three weeks since you’d moved to Ebott, a fresh face looking to start anew. The reappearance of monsters had led to a sudden surge in the job market. The city had become a hub to all shapes and sizes of beings, and depsite it all you had yet to make a single friend. Your job consumes your every waking moment and the rest of your time is allocated to a small bar named 'Grillbys' where youve started to become something of a regular. You make a bet with the hot bartender to be more outgoing. What could go wrong?
- Language:
- English
- Words:
- 1,454
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 22
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Summary
The past always follow her, no matter how far she is
- Language:
- English
- Words:
- 804
- Chapters:
- 1/1
- Hits:
- 5
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Summary
Dream is overworking himself again, Nightmare is going to do something about it
- Language:
- English
- Words:
- 307
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 41
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Deltarune-Lane : Apoliane by Penelope_258
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
22 Jun 2026
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Summary
Ceci est ma première nouvelle, je suis donc ouverte aux retours ( avec indulgence, bien sûr ).
Cette histoire utilise des pronoms inhabituels en français : iel, ille, al, ael, par exemple. J'accorderai parfois les participes passés et adjectifs au féminin ou au masculin selon le personnage, mais j'essaierai d'utiliser des formes épicènes le plus possible.Series
- Part 1 of Deltarune-Lane
- Language:
- Français
- Words:
- 6,864
- Chapters:
- 3/?
- Hits:
- 14
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Summary
The man behind the tree, the one who speaks in hands, has been known as a mystery to all who encounter him. His story, however, is quite humble. His triumphs, mistakes, and historical discoveries have been lost to time, but don't forget, the impact will never be lost. We must tell his story quickly, however, for it is rude to discuss someone who is listening.
- Language:
- English
- Words:
- 1,338
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 20
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Summary
Nightmare knew he was not the best in the Multiverse.
Hell, he was not even good.
He was the God of Negativity, a title that followed him like a curse carved into his very bones, and it made perfect sense that someone like him would end up completely alone.
Or: Nightmare is lonely so he ends up recruiting Killer, Dust and Horror all based on misunderstandings.
With fanart!
Series
- Part 3 of Undertale AU's
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Summary
Sans happens to wander into a plant shop, and his life is changed forever. Maggie is soft, sweet, and everything he never knew he wanted. Perhaps it's time to clear the way for new growth.
A VERY short oneshot, that eventually I may very well go back and edit. But for now, I was craving sweet and flustered Sans.
Series
- Part 3 of Get Boned
- Part 8 of Multifandom One Shots!
- Language:
- English
- Words:
- 3,972
- Chapters:
- 1/1
- Hits:
- 15