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The Need to Persevere and The Need to SAVE by DuckyDuckyQuackQuack
Fandoms: Undertale (Video Game), Horrortale (undertale au)
13 Oct 2025
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Summary
Sans has a mission, and Aliza is a part of it.
She will persevere through anything he puts her through.
She has to get out of this hell hole. She has to help Sans with his mission. It's a good thing these things align, but it sucks that they align in such a way-- Aliza doesn't want to hurt anybody.My work for AI-Less Whumptober! It's all one continuous storyline, this is NOT a one shot book (I'm bad at those lol)
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Chara had never gotten a happy ending.
Her life was one of tragedy, loss and trauma that would never truly go away.
Frisk was the one human she'd truly grown attached to. Even though she'd never admit it.
And so, when that run started, it ruined Chara. Turning her into a soul that craved strength and power.
Because she'd never truly possessed it in her life.
Because with it, she was unstoppable.
Frisk wanted her partner to have a second chance at life, a life where she'd be truly happy.
She knew that this would be her only way of redeeming herself in Chara's eyes. So she seeked the help of a friend.
A certain skeleton that Chara despises with all her heart... And she was about to owe her life to him.
Sans
How will the two emerge from the aftermath? And how will their relationship transform, if at all, from hostility to that of a friendship?
How will this 'Distance Between Two' be covered?
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Nearing the end of a pacifist route, Clover, Martlet, Starlo, and Ceroba are at the fateful New Home rooftop. Starlo diverts Ceroba’s attention, and Clover is prompted to leave before Ceroba can attack.
Martlet flies to her cabin in Snowdin with Clover under her wing, leaving Starlo to deal with Ceroba’s wrath. Clover reveals to Martlet that they leaped into the Underground to find Max, their childhood friend who had run off to Mt. Ebott one year ago.
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Distant Souls by Kaboom91
Fandoms: Undertale Yellow, Undertale (Video Game), Deltarune (Video Game), OneShot (Video Game), Heartbound (Video Game), Ib (Video Game)
11 Oct 2025
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The soul is an important part of a persons identity, the accumulation of a person's being. But different worlds play by different rules, so when a force trapped between worlds starts tampering with those worlds, things start to come apart. It'll take the help of a Fun Gang, a Savior, a young girl, a boy looking for his dog, a small cowboy seeking justice, and an incredibly determined human to save all their worlds from the ever looming darkness.
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You and Frisk decide to take a day off to have a picnic in Mt. Ebott, something to take your mind off work while waiting for winter.
So why, why are you now on the police office?
Why are you putting missing posters all around the city?
Why did you take them there? Where are they? Why did your worst nightmare become something real?Where are they?
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I don't have a summary i just pulled this out of my ass but if you like a slow burn with a Lot of Words and Feelings™ and Sans pleaseee give it a try. -
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Undyne had been getting increase of dreams, all relating to a child in a blue and purple sweater. Sometimes they would be friends, in others... well...
When Sans notices, he figures it's about time to let her in on a secret that only few know about.
Welcome to the Awareness Club, Fishstick!
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Undertale Adventures! by FizzySunpop
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
11 Oct 2025
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Summary
Republished for Undertale's anniversary, and will (hopefully) be continued past the two chapters I finished before.
Old description:
"Idrk how to exactly describe this story outside of saying something like 'Undertale/Deltarune Cinematic Universe for both official and fanmade content'. Like I really tried to make an in depth description but I. Cannot.
First Chapter is rather short but I didn't feel like it should have been labeled as a Prologue."
The description is still true, I still do not have any proper way of describing this story in my mind. The first arc, obviously, is an adaptation of Undertale with content from several mods, fangames, or similar AUs. After that, I will mainly focus on adapting Prequel-based content such as Handplates or Undertale Yellow before going into Sequel-based content, whether that be adapting Undertale sequels or adapting something that isn't an Undertale sequel but the arc based on it is still after the Undertale arc (like, say, an Overtime arc- or- or Deltarune, I could've just said Deltarune....)Series
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In which I make sense of what is left of a dying world by sansytama
Fandoms: Undertale (Video Game)
11 Oct 2025
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a collection of short writings i made. each chapter is its own thing and they have individual theme.
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The Normal route by Kozir
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
11 Oct 2025
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Flowey has been trying for a while now. Clover has fought him to limitless stalemates, and had just recently graduated to killing him.
Well done. Sure doesn’t work well for Flowey’s plan, though.
But when he resets, confident things will work now, he finds Clover acting strangely.
Does he… remember?
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From Beyond by emmylouispog
Fandoms: Avatar (Cameron Movies), Star Wars - All Media Types, Star Wars: The Clone Wars (2008) - All Media Types, Fran Bow (Video Game), Undertale (Video Game)
11 Oct 2025
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MULTI FANDOM CROSSOVER
MORE FANDOMS TO BE ADDEDThe goal is for each fandom to interact at at some point, but it starts out very episodic!
Ch 1- Star Wars x Avatar
Ch 2- Fran Bow x UndertaleAs the veil thins, and worlds collide, can the universes go back to normal?
Authors note: A concept from when I was 12 that I’m revisiting.
- Language:
- English
- Words:
- 878
- Chapters:
- 2/?
- Hits:
- 18
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Reality is unraveling. Time no longer follows rules—it bends, loops, and rewinds, pulling souls into paths they were never meant to walk.
As memories clash and timelines bleed into each other, a new force emerges—one that threatens to erase not just the future, but every version of the past.
How do you fight what was never meant to exist?
And what will you become when time runs out? -
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Nine strangers. One fall. A power none of them understand.
When eight teens and a young girl follow a mysterious light into Mount Ebott, they expect adventure. What they find is a crumbling underground world of monsters, magic, and ancient conflict. But that’s not the strangest part.
Each of them awakens with a glowing SOUL—a trait linked to their heart, their will, their essence. But these SOULs don’t stay still. They shift. Swap. Sync. And with every battle, their bond grows stronger… or more dangerous.
As they struggle to understand this new power, they’ll face old threats, cryptic warnings from a familiar talking flower, and a world that remembers the war they never fought.
They just wanted answers. Now, they’re part of something much bigger—and something down here is watching.
Welcome to the Underground. Stay determined… or get creative.
- Language:
- English
- Words:
- 10,929
- Chapters:
- 11/27
- Hits:
- 46
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Summary
There’s a limit to the things you can do today. Accepting this is healthy. Thankfully, there’s always tomorrow.
It has been five months since the barrier broke, and Monsterkind was freed. Frisk is trying to make sure no one gets left behind. Some Monsters willingly stay behind, and others struggle to make the move. After some failures and successes, Frisk will begin to realize that getting to the surface is not enough. To save Monsters, no, to truly save everyone, it takes more than just a little sunlight to solve problems.
It takes risks. It takes knowledge. It takes patience. It takes friendship. And, sometimes, it takes someone else to help.
A post-pacifist ensemble story that focuses on Frisk still trying to SAVE everyone- monster and human alike.
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i like it when you sleep, for you are so beautiful yet so unaware of it by cxlesstial
Fandoms: Undertale (Video Game)
10 Oct 2025
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Lost in their misery, they don’t notice the figure who’s climbed through their trapdoor until he’s cleared his throat. They immediately shoot up in bed, trembling fingers digging into their knees as they look for the source of the noise. They can only gape as their blurry gaze rests on a short skeleton, whose face is twisted with abject, blatant concern.
“you’re here?” Sans asks, though he doesn’t sound all that surprised.
“You were watching the vacuum cleaner commercials?” Frisk hiccups their reply, reaching up with a clenched fist to wipe away another offending tear.
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the fall by Helloiamnull
Fandoms: ULTRAKILL (Video Game), Undertale (Video Game), The Golden Quiche - Fandom
10 Oct 2025
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After realising about 'restarts' and 'checkpoints', V2 tries to get rid of V1, so that he can not go insane from the information of other restarts. Unfortunately for V1, instead of just going to another layer of hell, he is sent directly to another universe...where hell is absent.
There, the machine meets a flower, which starts a story.
just features a kind of trap harvester from the golden quiche(it's amazing, but I won't ask to check it out since you should have read it. (Maybe it's TGQ but with V1).
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'You think that this is a good story, one with happiness.'
'no.'
'This one only contains sadness and a tragic end.' -
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Summary
One day a human falls down into the Underground. Unbeknownst to everybody however, they start hunting down every single monster in the Underground. Everyone is trying to do their best.
Let's explore their perspective.
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Ever wondered what happened after the true pacifist ending, ever wish you could see all your favourite characters live out their happily ever afters on the surface, want to see what life is like when humans and monsters start living side by side again,
Well, since it seems like a proper sequel to undertale is never gonna happen, I've decided to make my own version that encapsulates everything I loved about the original game and how I think things would play out after the ending,
Hope you enjoy the story.
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What lies beyond The Barrier by YellowJustice
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game)
10 Oct 2025
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Summary
After offering his soul to the Underground, Ceroba, Starlo and Marlet decide that letting a 12 year old kill himself isn't a good idea.
Clover spends the next 4 years having a ton of adventures: saving a daughter with the help of his SOUL, spending time with her, training his SOUL magic, even landing a job!
He even got Asgore to let him live (at least) until the 7th human falls to the Underground!
What can go wrong for Clover?Well, the 7th human falls into the Underground...
And they left a pretty long trail of dust behind.With the supposed death of his lover, Clover get's enough Determination to overrwrite Frisk's SAVE.
So when the deed is done, Clover is truly alone now.
With no one left to stay for, Clover decides to complete his mission and leave the Underground.* (A strange light fills the room.)
* (Twilight is shining through the barrier.)
* (It seems that your journey is finally over.)
* (Your sense of JUSTICE was never this strong.)
Clover finally leaves the Underground, and when he opens his eyes...
"Well, Ah' can't say that Ah' expected that..."
He get's summoned to......
Series
- Part 1 of UTY x different universes
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Summary
This is a undertale au made by 💖ME~💖! It’s called Tiredtale. I was inspired to make this after finding out about a dead au called FlowerFell that I’m actually pretty mad about not being able to read it. Fuck you, you damn Frans shippers that caused that amazing au to go up in flames. Anyway, this is a au where Sans remembers each and every reset in vivid detail. He slowly starts to lose his mind each reset after another. He becomes heavily depressed and develops an extreme case of insomnia from the constant nightmares he has. Pap and other characters close to Sans notice and become extremely worried for the skeleton. The story takes place after the 999th reset when Sans has long gave up on counting how many there have been and just isn’t the same anymore. He is secretive, tired…oh so VERY tired, jumpy, always on edge. He’s closed off more than ever and rarely comes out of his room, let alone talks to is friends and his little brother….
- Language:
- English
- Words:
- 5
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 39
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"Despite having been the royal scientist for quite some time, Alphys never really felt like the title held any weight. Sure, the king came to the lab from time to time, forcing her to frantically clean up the cups of noodle and boxes of anime she found in the dump when she heard news of his arrival. Sure he gave her tasks from time to time, but they were meaningless. Checks on the Core—it wasn’t like she was the one doing physical maintenance, just checks and programming for self-repairing functions to work. She never even went inside the Core. Not after what happened to…well, never mind."
An Undertale prequel that looks in-depth into the events of the True Lab