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UNDERTALE: UPRISING by Enigma2203
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
10 Feb 2026
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Summary
Basically, three monsters plot to rule the Underground. This wonderful fanfiction includes:
- Character death
- Trauma
- Main character trauma
- MORE FUCKING TRAUMA
- Kickass action scenes
- Character growth.
- Adorable scenes -
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Summary
Para Ink, Error seguiría siendo su lucero, incluso, si observa desde lejos como se despoja en el altar en las manos de un hombre.
- Language:
- Español
- Words:
- 17,746
- Chapters:
- 1/1
- Hits:
- 1
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Summary
Underfell. La règle y est simple : "tue ou crève". La loi du plus fort y est souveraine et ceux qui font preuve de faiblesses sont sacrifié sur son autel.
Mais une nouvelle venue va rejoindre le cœur corrompu de la montagne, s'infiltrer dans les boyaux de l'Underground et retourner la vision de ceux qu'elle y croisera.Elle est un typhon.
Il n'appartient qu'à celui qui la croise de la suivre dans une vie plus palpitante ou de se noyer.
Je dédie cette histoire à ma femme, mon soleil, qui m'a donné l'envie de poster après tout ce temps ♥
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She Wolf- An Underfell story by AnyeWolf for Staringback
Fandoms: Undertale (Video Game)
10 Feb 2026
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Summary
Underfell. The rule is simple: "kill or be killed". The law of the strongest is sovereign and those who show weakness are sacrificed on its altar.
But a new arrival will reach the corrupt heart of the mountain, infiltrate the guts of the Underground and turn the vision of those she meets.She’s a typhoon.
It's only up for the one who crosses her to follow her in a more exciting life or to drown.
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The Sacrificial Skeleton and the Labyrinth of Gods by this_is_my_alt
Fandoms: Undertale (Video Game)
10 Feb 2026
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Summary
As a necromancer, you’re used to suspicious stares and whispers of heresy from the townsfolk. It only gets worse after you’re killed and walk Ebott Empire as an undead skeleton. When you hear rumors of a strange settlement that worships the undead, it’s too tempting to resist. The locals treat you better than you’ve ever been treated. That is, right until the moment where you’re dressed up and tied to an altar as a sacrificial bride for their skeleton gods.
Despite their advanced technology and magical prowess, you’re doubtful of their divinity. What kind of gods blush whenever they see a bit of bone?
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Dualtale AU: Two sides of truth by ED_Soul
Fandoms: Undertale (Video Game), Underverse (webcomic)
10 Feb 2026
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Summary
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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Megaverse (might change later) (insert oc au) by LeCaptainPancakes
Fandoms: Undertale (Video Game), Primeverse - Fandom
10 Feb 2026
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(Warning this is an insert character au)
ℂ𝕒𝕡𝕥𝕒𝕚𝕟 𝕒𝕟𝕕 𝕊𝕔𝕒𝕝𝕖𝕤 𝕙𝕒𝕕 𝕓𝕖𝕖𝕟 𝕒𝕥 𝕖𝕒𝕔𝕙 𝕠𝕥𝕙𝕖𝕣𝕤 𝕥𝕙𝕣𝕠𝕒𝕥𝕤 𝕗𝕠𝕣 𝕠𝕧𝕖𝕣 10 𝕪𝕖𝕒𝕣𝕤 𝕟𝕠𝕨, 𝕓𝕦𝕥 𝕒𝕗𝕥𝕖𝕣 𝕚𝕥 𝕚𝕤 𝕣𝕖𝕧𝕖𝕒𝕝𝕖𝕕 𝕥𝕙𝕒𝕥 𝕖𝕧𝕖𝕣𝕪𝕥𝕙𝕚𝕟𝕘 𝕊𝕔𝕒𝕝𝕖𝕤 𝕕𝕚𝕕 𝕨𝕒𝕤 𝕟𝕠𝕥 𝕚𝕟𝕥𝕖𝕟𝕥𝕚𝕠𝕟𝕒𝕝 𝕥𝕙𝕖𝕪 𝕤𝕖𝕖𝕞 𝕥𝕠 𝕓𝕖 𝕒𝕥 𝕒 '𝕥𝕣𝕦𝕔𝕖'.
𝔹𝕦𝕥 𝕟𝕠𝕨 ℂ𝕒𝕡𝕥𝕒𝕚𝕟 𝕘𝕖𝕥'𝕤 𝕤𝕖𝕟𝕥 𝕥𝕠 𝕒𝕟𝕠𝕥𝕙𝕖𝕣 𝕦𝕟𝕚𝕧𝕖𝕣𝕤𝕖, 𝕒𝕟𝕕 𝕒𝕔𝕔𝕚𝕕𝕖𝕟𝕥𝕒𝕝𝕝𝕪 𝕥𝕒𝕜𝕚𝕟𝕘 𝕊𝕔𝕒𝕝𝕖𝕤 𝕨𝕚𝕥𝕙 𝕙𝕚𝕞.
ℕ𝕠𝕨 𝕥𝕙𝕒𝕥 𝕥𝕙𝕖𝕪 𝕒𝕣𝕖 𝕚𝕟 𝕒 𝕨𝕙𝕠𝕝𝕖 𝕟𝕖𝕨 𝕆𝕞𝕟𝕚𝕧𝕖𝕣𝕤𝕖, 𝕙𝕠𝕨 𝕨𝕚𝕝𝕝 𝕥𝕙𝕖𝕪 𝕘𝕖𝕥 𝕙𝕠𝕞𝕖? 𝕎𝕚𝕝𝕝 𝕥𝕙𝕖𝕪 𝕘𝕖𝕥 𝕙𝕠𝕞𝕖? 𝔻𝕠 𝕥𝕙𝕖𝕪 𝕖𝕧𝕖𝕟 𝕨𝕒𝕟𝕥 𝕥𝕠 𝕘𝕠 𝕙𝕠𝕞𝕖 𝕒𝕟𝕪𝕞𝕠𝕣𝕖...?
Or in other words, Scales and Captain get sent to a undertale multiverse inside of the undertale Omniverse.
Characters:
Captain: My character (From primeverse)
Scales: My au (From mythictale)And most other undertale au characters, I'm too lazy to list them all, but I'm sure most of y'all know where these characters are from so I shouldn't need to explain em lol.
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Summary
愿（嗑）你们两个的每天都是节日。:-）
- Language:
- 中文-普通话 國語
- Words:
- 1,847
- Chapters:
- 1/1
- Hits:
- 2
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Summary
After his escapades in Toby Fox's Undertale and realizing that there might be a hint of a connection between his world and Undertale's, Alex Parker does some more research, trying to figure out how to properly link the two. After hitting an apparent snag in his investigation, he turns to the vast world of Undertale Alternate Universes, or AU's, to help clear it up. He decides to start with every goth lover's favorite: Underfell, the edgiest of them all. Let's see just how well he does in a world where "Kill or be killed" isn't just a rule, it's law.
Series
- Part 2 of Alex's Tales in the Underground
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(This is a comic)
Papyrus has a monster under his bed. -
UnderArchived: Skelebros From Undertale by Multiversecreator941
Fandoms: Blue Archive (Video Game), Undertale (Video Game)
10 Feb 2026
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Summary
Story Summary i guess...
"After the fight with TTGL! Sans and Kurokage, the universes of Undertale and Blue Archive got combined and created into a new one, named *UnderArchived*, but the impact made Sans and Papyrus got isekai'd into a universe of it"Created by Multiversecreator941
Story by Multiversecreator941
Authored by Multiversecreator941
Credits to Arkster-sensei from Youtube for this idea
Based on “Blue Archive: Visitor From Underground”
link to that series: https://www.pixiv.net/novel/series/10193059I DO NOT own any of the Blue Archive and Undertale characters
well, except my OCs-
Blue Archive belongs to Nexon and Yostar
Undertale belongs to TobyFoxFirst time writing a Fanfic like this, I'm sorry if my writing is really terrible.
Also there might be some grammar mistakes :PNotice: The characters' personalities might not be matched to their canon ones as I'm bad at getting a character's personality right
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Summary
For the longest time, I always thought that I would be a person who could just keep to themselves, mind my own business and just go about life in complete solitude. Basically, being a hermit and only leaving my safe household if I truly needed to.
Society, to me, was too crowded, too judging, superficial, and even materialistic… Not that I can really say anything; I can be very materialistic if my huge game collection and anime merch are anything to go by.
Truly, the hermit life is the ideal life for me.
…Until reality hit me hard like a like a hammer through a pane glass window at 80mph. Life as I knew it changed when I met "The Magnificent Sans" and taller younger brother, Papyrus. Somehow, we became good friends going on two months now. Somehow, these two kinda changed my life… Guess hermit life ain't happening for me anytime soon.
Who knew winning a raffle towards a 3 week trip vacation at a beach resort would test the boundaries of our friendship? I'm sure things will be fine. Surely!
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What would you do if you woke up in a completely unfamiliar place, forced to dance to the tune of a strange scientist? It's not an easy question, but it's one that a group of skeletons—Color, Geno, and Error—will have to answer. The story follows their adventure in a new alternate universe, fraught with many secrets and intrigues. Will the heroes be able to escape their enemies' clutches, or will they only complicate matters by attracting even more Sanses?
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YN was happy in their village, but the universe has other plans for her... And little did she know it was bigger than she ever could have imagined.
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100 years in the underground and finally the monsters has breached the barrier and arrived to the surface and by the help of Frisk Dreemurr she used the 6 human souls and reviving the monster legacy.
Although humanity is still the same even after hundreds of years evolving from swords and spears to guns and nuclear weapons, but some accepted the Monster kind and many were against it.
The monsters needed homes and by the hand of Jessalyn Knox the director of the phoenix order and Princess of Paradise she lended her strengths to the Monster kind for food, jobs, and homes.
2 and a half years on the surface and yet.. people are yet to ruin the monsters freedom..
Series
- Part 1 of ({_-THE FALLEN ONES-_})
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So, I don’t like how little stories there are of Ink having a mental breakdown. So I wrote him having a mental breakdown.
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Ink is laying on the ground. How did here. Why is he here?
He should get up.
He should go to work.
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Woventale - Shorts by Op7
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Alternate - Fandom
10 Feb 2026
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In Woventale, the Underground is a patchwork of strange cities and altered destinies, where familiar faces walk unfamiliar paths. Across the stitched landscapes of Snowfall, Sea Shore, Smokestack, and the Forest Ruins, lives intersect in quiet, calm, or sometimes dangerous, and unexpected ways.
This is the world woven by 'Watchers'. Like you. So why not stay awhile, and listen?
This - is not a grand story. This is a collection of short stories, moments, scenes and encounters.
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Ink was never meant to play god, but desperation has a way of rewriting rules. With Error closing in and entire timelines being erased, Ink makes an impossible choice: he fuses countless Undertale AUs into a single reality, hoping to preserve every version of Sans and Papyrus at once.
What he doesn’t account for is an anomaly.
Y/N exists where no one else like her does. No alternates. No echoes across universes. While everyone else has infinite reflections, she stands alone.
The combined AU reacts violently to her presence, binding itself to her soul and turning her into its living core. The Anchor. As long as she lives, the universe survives. If she dies, everything, every AU, every timeline, every version Ink tried to save, will collapse with her.
Now hunted, protected, and feared in equal measure, Y/N is trapped at the center of a multiverse that cannot exist without her. Ink must face the consequences of his creation, and the fate of every world rests on one human who was never meant to matter this much.
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It was her mistake but maybe it was fated to happen. Could the fate be wrong?
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It was her mistake but maybe it was fated to happen. Could the fate be wrong?