1 - 20 of 275 Works in Post-Undertale Genocide Route
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What if Frisk is in the world of HxH!
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The player is viewing the Genocide ending of OneTale, an Undertale mod that replaces Frisk with Niko from OneShot. Here, the player will learn that their actions did, in fact, have consequences. Woops.
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Post vengeance route Clover refuses Frisk the access to Ebott by Kittany_the_Fox
Fandoms: Undertale (Video Game)
29 Jun 2025
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Just an interaction I thought would be interesting !
After killing Asgore and freeing the 5 human souls, Clover came back to their old town. They grew up, and today, guard the entrance to mount Ebott to avoid anyone falling in.
But then Frisk happens
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After thousands of years, monsters are finally free!
However…only Frisk is realizing what “free” might really mean, and now she’s afraid that the world she led them into might be so far gone that it could kill monster-kind.
How could she explain to the people who had put all their faith in the surface what a nuclear bomb was? How could she tell them all she’d already given up, once, before she’d ever begun claiming there was hope?
Now she’s scrambling to protect them while violence begins to escalate and whispers of “the third” are beginning to circulate. But Asriel is still back there, and Frisk refuses to leave him behind. Besides, she still has questions to answer. Why was the Underground like a twisted mess of black tendrils that all wad up in some central dark mass? Sans calls it an anomaly in time-space. Frisk thinks it’s more like a pane of glass, struck from the center.
All she knows for sure is, to give monsters a safe world to live in, to let humanity finally have some peace, she’ll take the world as she knows it and tear it apart with her own hands, even if it means destroying herself along the way and never finding home.
After all, home is where…
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With the magical healing powers of ketchup, Sans survives a genocide run--but the rest of his world doesn't. He sets out across the multiverse searching for a family he refuses to believe is dead, struggling to come to terms with his new life and identity and making more deadly enemies the further he goes. When a rival emerges, he's forced to choose between his past and future or risk losing both.
Updates weekly-ish
(Yes, this is absolute crack--but I found out there was no AU where Sans's soul is literally ketchup and decided that was a problem I had to solve. There will be family fluff, plenty of angst, a bunch of AUs, and general shenanigans. I'm treating this seriously enough that I forgot how ridiculous this was until I had to write this summary.)
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Metamorphosis - Alternate Title: Equally Unfair Circumstances by Rando_internet_Guy
Fandoms: Undertale (Video Game), Deltarune (Video Game)
17 Jun 2025
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Frisk has been through a lot. The Underground was quite the journey, with a race of monsters that wanted them dead and an unknown malicious entity that had possessed them, and after a run they'd rather forget the entity is gone. Now, they and Chara are busy trying to help monsters integrate with humanity.
However, there is a reason Humanity doesn't know about magic, and that reason is keen to keep magic away from Humanity, with the belief of the ends justifying the means.
Opposing secret organizations, overseers with plans of their own, finding themselves in a situation where a single kid overturns the status quo that has reigned for decades. A kid that simply breaks all previously known rules.
However, every will can be broken, no matter how strong. So, the Willbreakers lock and load and are sent to handle the threat, with the goal of eliminating the anomaly. And so far, they have done a good job of keeping Frisk firmly in step one.
However, in a distant universe, a human has made a promise to an entity that wishes to compensate for its actions, and through the creation of a Dark Fountain they are now here.
This wasn't how anything was planned, but it will surely be very, very interesting.
Series
- Part 2 of Second Chances
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System Error: Accidental Acquisition of Children by Frikisbits231
Fandoms: Undertale (Video Game)
14 Jun 2025
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Error slid down, glued to the tree, his back to the ground, into the lush green grass on the ground. Later, he'd take a look at his current situation and possibly eliminate the place without a problem. Meanwhile, Error was resting, leaning against this comfortable, curvy tree, closing his eyes to feel something, something of the place.
Feel... the familiar ambient magic?
Still no monsters, humans, or standard souls around. Well, no one could hurt him if he got some rest, right?
This time, he mentally prepared himself and repeated the safety tests he felt like a mantra so he could get some rest.
He fell asleep shortly after.
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Sweetness with hints of security, calm, and the tranquility of dawning rest captured his senses. Something... familiar. Like... like chocolate melting on his tongue. He didn't know how he recognized that either. Still, he pulled the tongue out of his space, to capture it. He caught the sensations, almost becoming overwhelmed by them.
(O: The one where Error acquires an abandoned baby bone, which is, of course, his offspring too, yay...)
Series
- Part 3 of Fic's de Glitches & Fallos
- Part 2 of Escritura al Azar
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Gunpowder and Cocoa Don’t Mix Very Well by Random_Writer9
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
03 Jun 2025
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Clover had accepted his fate. Giving up his Soul to free Monsterkind was his final, ultimate act of justice. As his vision blurred, he surrendered to the euphoria, certain his story had ended.
Then his eyes opened. He was back where it all began. Disoriented but alive—only one thought came to mind.
Finding his friends.
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Flowey had planned to let Clover rest–honest! But as his vine hovered over the Save button, ready to overwrite Clover’s file–a flash of memory made him pause.
It was the run where he lost.
That alone was rare. But it wasn’t the loss that made him pause. No, It was who he saw in it.
Something shifted in his mind and as the gears turned a new plan started to form.
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Chara hadn’t expected to wake up, not after their plan to free Monsterkind had failed. They especially hadn’t expected to wake up to a Cowboy slaughtering monsters.
They reached for their save, determined to stop him.
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The timeline has become unstable from the three beings forcefully seizing control over it in rapid succession. The instability grew to be severe enough that the boundaries between past and future have started to blur into an unrecognizable present.
Series
- Part 1 of Gunpowder and Cocoa
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The Purple Door by GoldenWindRequiem
Fandoms: Undertale (Video Game), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
30 May 2025
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Mineta Minoru dies.
Someone watches.
A Purple Door creaks open.
(If you like this, please come heckle at me on Discord:
https://discord.gg/C3uQDZVTKf )
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Frisk is panicking over a test so downs a bunch of bravery teas, this leads to them having no filters for the entire day.
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Determination by MayBeADragon12
Fandoms: Undertale (Video Game), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), Deltarune (Video Game)
05 May 2025
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Chara doesn’t know how exactly her reincarnation brought her to the past in Japan, but the image of an empty Underground keeps the goal of protecting her new family at the front of her memory.
Especially when the night is treacherous with man-eating Oni.
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(kny!various x f!Chara Dreemurr)
.“Where are the knives?”
“Stay determined.”
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Every timeline ends the same: with you loving him and losing him. You remember it all—every pun, every death, every reset. He doesn’t. Not always. Sometimes he’s Geno. Sometimes Fatal. Sometimes Error. And each time, you fight your way back—through code, through glitches, through the void—just to find the version of Sans you once called yours. Even if he’s twisted, broken, or barely holding on. Even if he forgets. Because no matter how many timelines it takes, no matter how many versions of him you meet, you’ll always find him.
And you’ll always love him.
Over and over.main plot inspired by the song "Would You Fall in Love with Me Again" from the musical epic
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He's back.
And how could Asgore ever forget? The realization had struck him like a ton of bricks on his way to the throne room, the gaps in his mind suddenly filling, the name on the tip of his tongue in his grasp as if it had never left in the first place. Memories of a time long past bloomed in his mind like roses with sharp-tipped thorns.
Gaster.
Asgore has lost everything. His children died, his wife left, and his closest confidant has been missing without a trace for over a decade. The weight of the entire Underground rests on his shoulders, and terrible sacrifices had to be made for the good of monster-kind.
The final child has fallen from the surface world. The man who speaks in hands has returned – and he brings a warning of impending danger that has apparently destroyed the Underground many times before. He won't let that happen again.
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After "sparing" the Anomaly, Sans is surprised to see that they hadn't come back.
But... As the option to undo the broken world reveals itself, Sans has nothing better to do than wonder...
If he resets, could there really be a better ending...?
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Justice Ga Kill by BOOMSTICK91
Fandoms: Akame ga Kill! (Anime & Manga), Undertale (Video Game), Samurai Jack (Cartoon), Tall Tale 1995 (Movies)
31 Mar 2025
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When a young boy wanders out of Mount Ebott Post Genocide, he ends up in the Imperial Empire, when he tries to make his way around the Capital, he ends up getting robbed. When he tires to track down the thief he discovers that they belong to a group of assassins called, Night Raid. Can the young boy fit in with the assassins or will he become a new victim of the corrupted empire...
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─ㅤㅤ𝁐𔒱ㅤㅤIt's raining somewhere else ˒ 𓇬 ׂ ֢ by K0RPZE_34T3R
Fandoms: Undertale (Video Game)
28 Mar 2025
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💾 — MLM !? Sans x M!Reader
├ ALSO ON WATTPAD ₁ SLOW UPDATES ² MULTIPLE POV ₃
╰ https://www.wattpad.com/user/s0ul_34t3r ☆ 💿Series
- Part 1 of 𐂯 ྀིྀ ◞ Undertale x M!Reader 💬
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One can achieve two separate goals at once.
Ashes to ashes, dust to dust.Boredom leads to too much!
Series
- Part 4 of Under the Tale (Just Air, Got You)
- Language:
- English
- Words:
- 215
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 59
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"Let us erase this pointless world, and move on to the next."
Chara's greatest desire is to escape this world and find a new one where it can grind for power.
But when the player left the ruins of this world behind, Chara was unable to follow.
It's tried almost everything it can think of that could let it move on: none have worked.However, there's still one more thing it can try. It barely even considered this previously—it did not want to become dependent on traitorous monsters once again.
But desperate times call for desperate measures... It will get what it wants. No matter what it takes.It sets its eyes on Sans.
Series
- Part 1 of Corrupted Guardian AU
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Blossoms Among the Dust by Bi__Disaster
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
06 Mar 2025
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After completing their mission and freeing the human souls, Clover reflects on their journey. But instead of feeling satisfaction, all they feel is pain and regret.
So, in an act of desperation, they reset back to the beginning, ready to make the right choices this time. But after absorbing Asgore's soul, something in this next run is...off.
As Clover embarks on one final journey through the Underground, they are tasked with not only surviving, but also figuring out what the hell is wrong with their soul.
Luckily for them, they might just have some extra help.
UPDATE: ON HIATUS. Update is in the most recent chapter
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ArcheaTale is an Undertale/verse AU I created where I took somewhat Canon AUs and twisted them slightly. It revolves around two original gods who once ruled over the multiverse. Now, long after the deaths of the two, many guardians and gods control in their place to try and stabilise the Multiverse.
It had been like that for as long as almost everyone had been alive. Many millenia of fighting between groups or elements. Violence, plague, death, negativity thrived while positivity and life fought back. It seemed endless. But there had been a time, many many moons ago, where the two coexistented.
Where peace breathed and hope laughed. A simpler time where two deities controlled the balances of the multiverse and the AUs were as diverse as their inhabitants. It took a tremendous shift to cause that world to fall into the chaos it is now.
The shift happened in the heavens. Among the stars, clouds, and the dancing dreams yet to be filled. Seeping in among those dreams were nightmares.- Language:
- English
- Words:
- 2,009
- Chapters:
- 1/?
- Kudos:
- 4
- Hits:
- 19