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Dualtale AU: Two sides of truth by ED_Soul
Fandoms: Undertale (Video Game), Underverse (webcomic)
26 Nov 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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Unexpected Hero by LemonCake64
Fandoms: Undertale (Video Game), The Legend of Zelda & Related Fandoms, The Legend of Zelda: Twilight Princess, Deltarune (Video Game), The Legend of Zelda: Ocarina of Time
26 Nov 2025
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“Not so fun being stuck in some loop right? Trying to fight to protect what ya got, not getting a choice in it. If I had the choice I wouldn't remember either.” The words oddly felt comforting. Link let out a slow breath, closing his eyes for a brief moment.
He didn't feel alone for the first time in a long time.
And that?
That was terrifying.
“To be honest, I kinda gave up a while ago. Just sat back and let the chaos go on, felt like nothing I did mattered anymore. Everything would just be reset anyways. Stopped caring what happened, that was until you showed up.” The skeleton’s eyes bore back into the Hylian.
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After the Visitor left behind that angelic abomination who wipe out 90% of humanity, Sam know's that they can't stay in the city. Searching in the former room of Sybil he found the former research of the astronomers and discover a place that was not affected by the visitor, Mt Ebott. He doesn't know why but it seems there is some kind of barrier that keep the place safe during the end of the world.
With only that as his last hope to survive, Sam and his friends go to Mt Ebott but the exalted four find them, taking them one by one until it was only Sam and the childrens.
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The Odds Of Being The Only Human by That_Red_From_Brasil
Fandoms: Deltarune (Video Game), Undertale (Video Game)
25 Nov 2025
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Kris's childhood growing up in Hometown and the struggles that come when you're the only human in town full of monsters
Or
Being human is not all that cool in the Deltarune universe and also some spooky shit happens by the end.
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As you walked you failed to hear the screams of terror of a bus going over 100 miles per hour and the sounds of it starting to bust down- it speeds near the sidewalk—the people in it shriek. Their blood curling screams didn’t occur to you, your headphone quality being way too good. Your shoulders relaxed as you stretched your limbs; very much unaware of the danger and pain that would very much make your life way more miserable. You should move out the way. But- likewise, you are unaware. Of death flickering and time excited to cut your strings.
The bus is almost out of energy- and has been stopped.
Or so people thought.
It began to tilt- right where you were very much slowly walking. Andddddddddd—
It didn’t crush you to death.
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This the story of Kingdomtale, an au I created that's essentially Undertale if it took place in the medieval century. It's not historically accurate but it's my take on this popular concept. I have already posted a series for this au but have grown dissatisfied with it. I know I can write something better. This is the new and improved Kingdomtale, and it's going to come back even stronger and better than before. My hope is that this story can feel nostalgic in a way, like you are experiencing Undertale all over again for the first time.
Here is just a quick snippet of the plot: The year is 15XX, and another human has fallen down Mount Ebott. This human is no more than a child, having woken up in a bed of golden flowers. How did they get there? They'll soon discover a world of monsters, magic, and much more. Can one human child bring peace between two different races that have been forced to share one Kingdom? Well, you'll just have to read to see if the story is still as you remember it.
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For as long as you remember, you've only known nothing but cold and the feeling of worthlessness. You once had a source of light in the dark but it no longer exists. Will you find it again with your clouded thoughts and memories? Or will you succumb to the rising waters and drown?
In which, you are an AU sans with severe depression, self worth issues and hazy memories of yourself—just wanting to go home…
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Scattered Souls by Eris_Atlas
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
23 Nov 2025
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In the fight with Omega Flowey, when Frisk calls out for help and the souls answer the call, one does something unexpected causing a reset that brings all the souls back to life in the location where they drew their final breath.
Now, with these 8 souls lost throughout the Underground, they have to manage their way. Will they see the sun? Simply die in the pit once more?
Will the lost souls find what they seek?
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
22 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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The Doctor's Descent by Feanyx1
Fandoms: Undertale (Video Game), Doctor Who (2005), Deltarune (Video Game), Doctor Who
22 Nov 2025
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He thought that the radiation would kill him. He thought that his time as the Doctor would come to a sad and brutal end. He was wrong. And that was so much worse.
In his efforts to find himself, and without his companions, he accidentally stumbles onto a monstrous civilization miles below the Earth. With his newfound DETERMINATION and some new allies, he'll come to realize what it truly means to be a friend, and learn how to live his last lives with his head held high.
And make sure that, just this once, everybody lives.
OR
Undertale but the Tenth Doctor replaces Frisk. Fluff, angst, AUs, and timeline shenanigans ensue.
*No knowledge of Undertale or Doctor Who is required, though it is helpful if you've experienced at least one of them.
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Deltaronpa (Deltarune Danganronpa) by Slays_The_Crusader
Fandoms: Deltarune (Video Game), Dangan Ronpa Series, Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
22 Nov 2025
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Kris Dreemurr, alongside their childhood friends Noelle and Dess Holiday wake up one day in the beautiful halls of Hope's Peak Academy alongside thirteen other students, trapped and forced to kill eachother for a chance to escape by an evil TV and his associate.
Who amongst these humans and monsters will survive this ordeal? Who among them will kill in desperation to escape? Well you gotta read the fic to find out.PROLOGUE: COMPLETE
CHAPTER 1: COMPLETE
CHAPTER 2: IN PROGRESS
CHAPTER 3:
CHAPTER 4:
CHAPTER 5:
CHAPTER 6: -
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After a pacifist and genocide timeline, Frisk and Chara come to form an uneasy alliance in a new warped timeline. The six fallen humans have been miraculously resurrected and scattered across this new underground, along with new locations and monsters appearing in this warped reality.
Follow Frisk and Chara in their journey to collect the six fallen humans and uncover the mysteries of this new anomalous timeline.
- Language:
- English
- Words:
- 4,001
- Chapters:
- 1/?
- Kudos:
- 2
- Hits:
- 69
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It's been months since Frisk and Flowey's battle. The former human has fully settled into their new life in the Underground. Things are changing, but they're okay with that. But when they find out that humanity has survived, Frisk must overcome their own struggles and trauma to bring about peace. Not easy when they've suffered so much. And Flowey is still out there, watching and planning.
Series
- Part 2 of Divine Soul
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Kris does not cope well with a god controlling them
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Togore's Adventures In life, death and something else by Dranton
Fandoms: Undertale (Video Game)
19 Nov 2025
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Story about Flowey and Togore's transformation into a young adult and just pure vibes. Don't read if you're looking for angst, because it's not gonna be the focus of the story. There are both great achievements and failures, just like in any life!
[THERE ARE SPOILERS] to Undertale so if you haven't played that decade old game — I recommend you to at least watch a play through or experience it yourself by buying the game. It's actually beautiful but anyway.
Not exactly loaded with ships, but these are the ones that I'm going to disclose — Alphyne and Soriel (I know some people will not like this ship, but I promise there isn't gonna be anything major or a huge focus on them ^^)
Relationships between other characters in the story might blossom in the future too, but I'll also try not to force too much attention on them.
No update schedule. I'm a casual writer. A bad writer. Ao3 won't get me.
IT'S IN THE WORKS IT'S NOT FINISHED!!!
- Language:
- English
- Words:
- 814
- Chapters:
- 2/6
- Hits:
- 16
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History of DUSTSHIFT by DUSTSHIFT
Fandoms: Undertale (Video Game), Storyshift (Undertale AU), Dustshift (Storyshift Take)
19 Nov 2025
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A three-part summary of the history, world, and events leading up to the primary narrative of Dustshift, a Storyshift Genocide Route take, starting from the very distant past before the war broke and led to the Monsters' sealing inside of Mt. Ebott, to the present with Chara.
Series
- Part 1 of DUSTSHIFT
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Overtale by Fablefiction12345, SkeletonsInTheBroomCloset (anotherutfan), TheGreatMorales
Fandoms: Undertale (Video Game)
17 Nov 2025
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It wasn't easy bringing the monsters back to the surface.
And against all odds, Frisk managed to do it.
But between trying to convince the humans to let monsters back into society, and solving past issues between the members of their own self-proclaimed family, they've still got a lot of work on their hands.
And when an unforeseen surprise causes some new additions to the family, Frisk realizes they might've taken on more than they could handle.
But they're sure as heck gonna stay determined.
(Based on an active roleplay)
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“Captain.” His soft voice would’ve been pleasant if not for the looming dread of his next words. “I’m sorry to bother you. We got a concerning tip at the start of the hour: a pile of dust outside the church. I don’t think I need to clarify more than that.”
“You don’t. Have you called anyone else?”
“Forensics, and now you.”
“So I wasn’t your first pick.” He scoffed at my joke. “Call Susie for me. I’ll be there in ten minutes.”
“Thank you, Kris. I knew I could count on you.” The relief in his voice eased the frustration of the situation. It was hard to be annoyed when someone believed in you, even if you were dead tired.
After a murder is reported outside the church of Hometown, Captain Kris and Detective Susie are on the case.
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Susie, the new girl in town, is often called a lot of things.
The brute.
The weirdo.
The problem.If you asked Gerson what she should be called, he would say...
The future.
AKA Gerson adopts Susie and becomes the parental figure she always deserved. There are some small canon divergences and plot changes planned (i.e., the kids in Gerson's class are high schoolers instead of middle schoolers, making Kris, Susie, and others 16-18 years old), but nothing too crazy!
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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