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Dualtale AU: Two sides of truth by ED_Soul
Fandoms: Undertale (Video Game), Underverse (webcomic)
14 Oct 2025
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Description:
This story is based on the distant and little-known Dualtale AU,where nothing is as simple as it seems. In this world, unlike the original Undertale, monsters were never trapped underground. But what was the price for peace between humans and monsters? And how is it connected to XGaster, when these events unfolded long before the X-Event?
(Features characters from Underverse and Undertale,adapted for this story.)Author's Note:
In the Dualtale AU,the famous rule "Kill or Be Killed" is replaced by another:
"Speak out, and you will be silenced."
This is a universe built on lies and dark secrets that everyone holds.Every character has their own agenda and their own rules and it's better not to try and learn them.Series
- Part 1 of Dualtale AU: Two sides of truth
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Ask/Prompt Fic: Undertale & Deltarune by Deusex1000
Fandoms: Undertale (Video Game), Deltarune (Video Game)
14 Oct 2025
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Various short stories about Undertale & Deltarune
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En este libro veremos incorrect quotes de este bonita pareja y un poco más con los otros personajes.
Esté libro sera un au propio sin necesidad de ser muy extenso.(Lo aclarare en el primer capítulo)
Todos los personajes son de Toby Fox.
Versión original en Wattpad.- Language:
- Español
- Words:
- 854
- Chapters:
- 4/4
- Hits:
- 6
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The first? The original or the last by Glfrax
Fandoms: 전지적 독자 시점 - 싱숑 | Omniscient Reader - Sing-Shong, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
14 Oct 2025
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The oldest dream was reading outside his multiverse as he observe he notice a world where he exist. Kim dokja was born with a dreaming quirk but coupn't prove it after the incident he got stuck in a coma as he open his eyes His voice trembeling coma out" is this the start of the circle?".
Or the oldest dream may be from the my hero academia world and seeing other world he encontered his 'original one'
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After gaining freedom from the soul kris does their usual routine get up, go to school, talk to susie etc but they have had a gave a shot and asked berdly to play smash with them.
little do they know tho a new student has came and lets just say kris DOESN'T want that.
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After watching a human RESET their genocide route ad nauseam, a lone scientist decides to pull in another human to put an end to the tale. At least, hopefully one other human will be determined enough to stop them.
DoubleLight is based on DoubleTale: Rewritten by XWolf26 on Fanfiction.net.
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Justice Evolved by The_Spar1an
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
14 Oct 2025
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Clover remembers.
After spending quite some time dead, He finds himself with memories he'd rather not have.
Memories that tell him who he truly is.
Memories that haunt him.
edit: lowkey put me on the stuff I was on when I wrote this summary.
Anyway, basically Clover remembers resets, especially genocides. So he basically remembers how to use his powers from previous runs as well, and then la tee doo dee dum, and bam. Justice Evolved.
If you're curious enough to have questions, maybe read the fic. It'll boost my ego. (please)
------------------------------This work will contain Original characters for the sake of worldbuilding, and I fully intend to make some of them play major roles in the story.
This is an alternate universe to Undertale Red and Yellow.
This work will be from Clover's POV. (written in first person, not second person, aka "I" instead of "You") -
New Hometown by NullVol
Fandoms: Undertale (Video Game), Deltarune (Video Game), Undertale Yellow (Video Game)
14 Oct 2025
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School is about to begin for the children of Monster Town, making life all the more hectic for them. That is only reinforced by the sudden appearance of a new human who feels they have no control over their own life.
Tags are subject to change. May go on hiatus a few times as I imagine this one to be on the larger side.
Series
- Part 3 of To Resurface
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The sounds of soft knocks took their attention away from the screen. They stared at the door, bewildered. Who was awake at this time of hour? They waited until another series of knocks to confirm someone was there.
There were two guesses. One was their roommate, but that was immediately crossed out since they had a key to their room plus they were still out of town. Second, was the RA but they were positive they were asleep at this hour.
Hmm… Perhaps a small distraction could clear their mind.
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Without History (maybe some things should stay forgotten) by Human_with_no_life
Fandoms: Undertale (Video Game)
14 Oct 2025
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After the barrier breaks, Monsters and Humans have learnt to live together on the surface, there is still many mysteries hidden in the underground. Most of them will stay forgotten or buried forever.
Until a ‘promise’ Sans made with Frisk leads to him telling a long and complicated story. His story, well not exactly 'his', but with as many questions as it answers, it seems to raise more. One thing is for sure; this tale will change everything.
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Adventure Tale by Kaboom91
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Adventure Time (Cartoon 2010)
14 Oct 2025
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After countless runs, something goes wrong, and now humans and monsters alike have been pulled into a strange new land with its own rules and its own dangers. Come Along With Me for the crossover nobody asked for, its ADVENTURE TALE!"
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It's been three years since you fell into the underground and found a family among the monsters of the Ruins. You love your life here with Mom, your ghost buddy Blooky, your prickly friend Flowey, and the host of Ruins monsters who have accepted you as their own, but things can't stay this way forever. Your friends deserve to see the sun, and there's a prophecy to be fulfilled and a barrier to be broken. Your determination pulls you onward.
The only trouble is that you'll have to make it through an underground full of monsters clamoring after the red SOUL in your chest, and each day as circumstances become more dire they lose a little more hope. This is a more desperate underground than the one you landed in. The odds don't look good for one pacifist child with a stick.
Of course, you aren't completely outmatched. You've spent the last three years training for this moment, and you don't intend to let anyone hit you.
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rejoice despite the fact this world will hurt you by viktorforgets
Fandoms: Undertale (Video Game)
14 Oct 2025
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two children struggle to accept that their actions matter now.
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october 18th : loss of powers
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- Part 3 of whumptober 2025
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Upon numerous walkthroughs, Frisk comes across a grayed out businessman with a few words of their pasts.
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Bonus Content by SpectrumWriting
Fandoms: Undertale (Video Game), Deltarune (Video Game)
13 Oct 2025
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Something has gone wrong.
Ten years into their happy ending, Frisk wakes up back in the Underground with no memory of reseting.
A few hours after parting ways for the night, Kris and Susie wake up in a strange new Dark World... again.Frisk's save file has been corrupted. Kris's soul isn't behaving how its supposed to. And Ralsei shouldn't be here at all.
An epilogue and a story half-told can't coexist without some conflict involved. -
⊹⋆The Stars were Made for Her⋆⊹ by Sam_xqr
Fandoms: Undertale (Video Game), Original Work
13 Oct 2025
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A falling star,
She was the star.Can our main character thrive through this new foreign land, or will she be washed away along with the effortless tides... only the future stars know.
(First fiction story ever, was going to make this an Undertale fic... But, I don't know, please give suggestions! :3 I will be doing a full reader POV first, then we will slide into the meeting of these fun Undertale characters!)
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A human child by the name of Frizk climbs the forbidden mountain, Mt. Ebott. Her goal? To go to a new world in order to live a new life. While she expects an isekai, she instead falls into the Underground where she meets a talking flower. This flower has the ability to seemingly alter time. To the human's surprise, the flower is helpful and friendly. Now in the Underground, Frizk wishes to live a life amongst monsters. To do so, she must keep her human identity a secret.
Unlike the Underground that you readers may know, this Underground is different. In it exists a young Boss Monster, the child of the King and Queen who are still together.
This young Boss Monster wished from her youth to make the Underground a better place. In order to accomplish this, she became the Royal Scientist and started to improve the lives of monsterkind. However, in doing so, she ended up often overworking herself. Monsterkind treated her as the pride, joy, and second hope after the long-distant passing of their first prince, Asriel. Due to her habits, this Royal Scientist Princess lives a solitary, lonely life.
Will the two be destined to meet? Or will they continue on with their predicament, their lives never crossing paths?
Series
- Part 1 of Sistertale
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A mix of fluff, angst, and crack! Universe and genre used will be in each chapter's author note, along with chapter specific warnings.
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You fell into the underground, don't know how or why but you're here so you might as well try to get out of this place while making friends on way. Speaking of friends- you need to get back to one.
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Frisk, a child who previously gave up on living due to having a hard time on the surface, falls into the Ruins. After spending time in Toriel's care, they find the strength to go on. To them, this means they need to leave the Ruins. After facing their first death during a confrontation with Toriel, they address the elephant in the room (or rather, the extra human in their brain): Chara. Chara has no memories of their life and no motivations in particular, but as they get to know the other human kid that they're stuck with, they can't help but get attached. Frisk reminds them of themself, somehow, as if they were two sides of the same coin.
Together, they traverse The Underground in their now shared body, meeting foes, friends, and foes turned friends along the way. Despite having previously considered themselves good as dead (or actually dead in Chara's case,) they find their hearts crying out that they want to live, no matter what that ends up meaning to them.