1 - 20 of 402 Works in Alternate Universe - XTale (Undertale)
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This little skele, a Sans type, is used to taking on whatever title was expected of him. So when the entire multiverse tells him he is a 'Bad Sans' who can really blame him for joining others who fall under this title. That is as long as Nightmare finds him useful. His past titles have left him with a very limited set of skills, knowledge, and expectation. Yet he is willing to give up so much more just to stay.
First chapter is NSFW, and then there aren't going to be much until maybe in the future. Plenty of triggers so please tread carefully, I am not used to posting for others to read.
Series
- Part 1 of Imprint
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Hello!
In honor of Underverse 0.8 part 1 coming out and Jakei’s year and a half hiatus, I am going to (try to) do this thing I will be calling “Weekly Underverse” where I update weekly with some sort of Underverse related content.
It’s not going to be anything big. Some weeks it will be a 3,000 word Cross fic, maybe a digital drawing I worked on for 5 hours. Other weeks might be as small as a snippet of a poem that was inspired by an Underverse thing, or a little doodle I did in my notes packet. It may even be recycled content I have posted outside of this project.
But whatever it is, I will try to update it weekly until the hiatus is over.
Weekly Underverse starts today, November 20, 2024. Updates will (try to) be every Wednesday.
Underverse belongs to: Jael Peñaloza
Little note: I am nowhere near an Underverse expert, so most things might be fanon, most things might be Cross focused, but maybe I’ll do some learning and write with the other characters. Maybe I’ll give fun facts one week. We’ve got about 78 chances so… we’ll see where this goes!
Series
- Part 6 of *Proceeds To Push Cross Sans Over*
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Scythe’s Guide To Surviving In The Multiverse by MeralAce
Fandoms: Undertale (Video Game)
12 Jul 2025
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A Sans loses his AU after some traumatic experiences caused by a murderous child.
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XChara being the Higuruma (only one available) of the situation is tasked with attempting to reform the captured villain of Betty, who isn't too keen on the whole "going good" idea.
I'm aware of the amount of canon breaking I'm doing by even placing XChara in this scenario but it's a sacrifice I'm willing to make
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The Serif household has been through many odd scenarios. After all, they are entirely comprised of other versions of the same two skeletons who got stuck in the world they have called home for six years, unable to return to their worlds and thus forced to carve out a life for themselves until further notice. All things considered, they found their stride and adapted to the ongoing weirdness of universe hopping.
That is, until she arrived. Flora, a woman so out of left field and disrupting their normality, appeared in the basement, battered and bloodied to hell and back. Stuck like all the others who had appeared before her, the Serif household is forced to accommodate her until she stabilizes, slowly beginning to get to know the lackluster and stone-faced woman who ensures they don't injure themselves via stupid means.
Few expect her to open up. Fewer expect her to accept becoming friends.
None expect for any of them to become much, much more.
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‘If not Nightmare, who are our assets right now, and what are the skills they can offer?’
Cross looked up, still trying his best to comfort a shaking skeleton in his arms.
‘Dust is out of commission. I won’t be able to calm him down enough in time. He is freaking out and seeing as they got us into this situation, I bet Killer is having one hell of a laugh-’
Killer wasn’t moving.
Looking over his shoulder, Cross expected to find Killer enjoying the thrill and probably doing something stupid, digging them deeper into the ground.
Why wasn’t Killer moving?
They just sat there, staring. Their crooked smile plastered uncomfortably. Their void eyes empty and hollow.
It was… Concerning. Calculating. Cold.
Series
- Part 4 of Killer’s Krying Korner
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Cross finds himself responsible for the death of his universe. After years in the white unending void, his tears summon Nightmare, who brings him back to the Castle.
It’s the aftermath of a more brutal XTale au, where Cross deals with PTSD and OCD, while trying to make a place for himself in the gang. It’s difficult, when you make mistakes left and right.
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Nightmare notices lately there's been high influxes of negativity within the multiverse. Even stranger so, was how heavily concentrated they were within one AU. When the demigod of negativity finds opportunity to investigate, he didn't quite know what he expected.
It certainly wasn't this.
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(A/N: An f!god fanfic. Error comes in later.) -
Rewritten Wishes by ThePerfectldiot
Fandoms: Undertale (Video Game), In Stars And Time (Video Game)
29 May 2025
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The loops were over, the King was defeated. Siffrin was free.
What Siffrin didn't expect, however, was to wake up in yet another field, bringing back unsavory memories. And what was this strange shade that seemed to permeate the world itself?
............
An In Stars and Time and XTale Crossover fic. Yes folks, you heard that right, XTale.
Undertale by Toby Fox
XTale by Jael Peñaloza
In Stars and Time by insertdisc5ON SHORT HIATUS BECAUSE DELTARUNE TODAY
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Undertale is a game half the world has played, and its fandom has flourished. So it was quite the surprise when monsters began to emerge from a mountain.
Sure, everyone had knowledge of the True Pacifist Route, and those who've dabbled in the fandom have read stories of Post-True Pacifist, but the fact that a new race of monsters emerges out of nowhere was interesting. Monsters suddenly had to cope not with the humans forcing them back underground, but with their publicity and unexpected fame. There are other small inconsistencies that no one can figure out, like the name of the Eighth Fallen Human.
Meanwhile, across the Multiverse, Nightmare is amassing an army. He shatters the wall between fact and fable and prepares an attack. Some of his subordinates are more happy with this than others.
If it wasn't enough that monsterkind was famous, suddenly, the humans' own works appear to come to life to wreak havoc across the city. Hurting them is impossible. All that's left is to stall.
A tribute to and deconstruction of the Undertale Fandom.
Everything has been written beforehand. It will always update once a week.
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CHAPTER ONE: “PUSH COMES TO SHOVE” by P0WP0W
Fandoms: Undertale (Video Game), Sans AU - Fandom, Nightmare gang - Fandom
21 May 2025
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Hello, thanks for clicking on this FANFIC!— This is basically me hyperfixating on “HORRORTALE” and
the storyline with how the nightmare gang realistically would work?So basically, From first aliza perspective of how her live was for two years straight in the AU- “HORRORTALE” before magically Running into a portal, transporting her into a strange place where a lot of humans and monsters collectively meet together before she knew it— seeing familiar various versions of monsters she knew and even ones from her PLACE.
Collectivity she meets different humans, especially involving ones who was associated with ``Nightmare?—``
So hope you guys enjoy, sorry for the rushed writing, this is my first time doing this.
- Language:
- English
- Words:
- 1,751
- Chapters:
- 1/1
- Kudos:
- 9
- Hits:
- 85
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A game for the Admin by Lunaria_maharlika
Fandoms: Undertale (Video Game), Underverse - Fandom, Xtal, Xtale - Fandom, underswap, Dreamtale - Fandom, AU - Fandom
06 May 2025
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Boredom.
Boredom was what lead to all of this.
Cross, the admin, had decided that he was bored and wanted to play a game with the people in his multiverse.
The game of balance.
The game of balance between, positivity, negativity, creation and destruction.
It doesn't matter what happens, how many people and monsters get killed or the amount of AU's his game will destroy.
In the end, he will still be the hero of this-HIS multiverse.
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Cross didn’t know what came to him.
Maybe it was a guard instinct, maybe it was his fight or flight mindset. But, at the moment, he really, really, wanted to punch himself for not just daring to think this was a good plan, for not just having the impulse, almost automatic instinct of saving someone, but that someone being Killer.
His ideas were not always the brightest.
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You knock out one of the skeletons that breaks into your house ….with a baking pan.
What could go wrong?
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No começo era bom.
Não, era ótimo.
Era como deitar-se num campo florido, banhado por doces raios de sol do amanhecer mais lindo que você veria em toda a sua vida.
Era como estar numa sala repleta de amigos e familiares da qual você ama e quer bem, olhar ao redor e sentir seu coração se aquecer porque todos estão bem e se divertindo, inclusive você.
Era como se jogar de cabeça num mar de todos os sentimentos mais puros, bondosos e positivos.
Dream amava aquilo.- Language:
- Português brasileiro
- Words:
- 1,271
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 67
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It had been an act of mercy, the first time he had done it.
“Cross.” Their voice grew louder, shifting from a croak to a hoarse whisper. “We’re friends, right?”
He could do nothing but nod, unable to find his voice. He hoped they would not notice the lilac tears welling in his eye sockets.
This was all his fault, he couldn’t get them out of here, couldn’t return them to their home, and now his prison would become their tomb.-
Cross, core member of the Star Sanses, experiences a series of events that greatly affect his morality and opinion of his teammate, Ink.
Nightmare and his gang deal with the aftermath. -
One Shots Mixtos (Sanscest / Sansby / Sanscest + Grillby / +18) by jack12frost
Fandoms: Undertale (Video Game)
20 Mar 2025
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One shots diversos de estás relaciones
Tenemos:Dreammare
Kustrad
Dustberry
Horrorlust
Crosskiller
Sansby
Y más
Series
- Part 3 of Sansby/Sanscest Multiverse
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Skeletons! (Au Sanses x reader rewrite) by Disasterbitm
Fandoms: Undertale (Video Game), Undertale AUs - Fandom, Underfell - Fandom, Swapfell - Fandom, Xtale - Fandom, underswap, Outertale - Fandom, ErrorTale - Fandom, Dreamtale - Fandom, Horrortale - Fandom, Lusttale - Fandom
03 Mar 2025
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Y/n L/n is a scientist experimenting with the multiverse theory. She ends up messing with things that she shouldn't and after an accident at the lab, a bunch of similar looking skeletons start appearing at her house. What's a girl to do?
Now she's got a bunch of roommates, a multiverse to fix and secrets to uncover as an unknown force puts her and her new husbands- I mean friends in danger.
And what's with all the skeletons trying to win her heart?Please read the note about Ink Sans being aro/ace in the first author's note, thank you :)
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What if, instead of being the one who suffers at the hands of those strange skeletons and their crazy girlfriend, you were their sibling?
It seems time has rewound. You don’t know what happened, but you know you need to help your younger sister. Yes, that’s what you’re going to do, even though these constant déjà vus are already starting to get on your nerves.
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English is not my first language so there may be a lot of things written wrong here, please be patient.
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Ebott was a city that promised a fresh start after breaking all ties with your family. It still is, almost a decade later, as you find yourself having to land on your feet again after a particularly heart wrenching breakup. But you’ll pull yourself up, always have, unexpectedly helped along the way by a gang of skeleton Monsters who are no strangers to the pitfalls of negativity.
A non-linear short story collection about our reader-insert Addison and the bad guy bone-heads that have taken up residence in her life.
Now with a table of contents!
Series
- Part 1 of Those Lost & Thrown Away