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Corporate Fallout Vol. 1 Chapter. 1 "Weakest of Today" by EsperSystem
Fandoms: Undertale (Video Game), Original Work
16 Feb 2026
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Summary
Quietly, the world came to an end.
Monsters changed. Humans became inflexible. Souls started to shatter.The Angel is regarded as the Strongest of History in a post-nuclear wasteland where emotion determines reality and one's SOUL strength determines their level of power. Undyne is today's strongest. And a red SOUL awakens somewhere beneath it all.
Frisk had no desire to serve as a weapon.
Regretfully, the world has already made up its mind.Series
- Part 1 of Undertale: Corporate Fallout
- Language:
- English
- Words:
- 3,579
- Chapters:
- 1/1
- Hits:
- 0
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we can see when the dark sets down by skybluescarf
Fandoms: Xtale - Fandom, Undertale Yellow (Master Sword Video Game)
16 Feb 2026
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Clover meets Chara across several XTale timelines.
A gift fic for wimisoda on Tumblr, inspired by wimi's oreopowder (XChara x XClover) works.
- Language:
- English
- Words:
- 2,775
- Chapters:
- 1/1
- Hits:
- 12
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So, the general idea of this fanfic is that Chara never commits suicide and because of it they are still alive when the other humans come to the Underground.
They still hate humanity, but nevertheless aren't willing to commit suicide as they don't wish to leave their family behind, even if that selfishness means Monsters remain trapped in the Underground.
Then four years into their era the second of the eight humans arrives to the Underground, the one who arrived didn't trust Monsters and had in fact come to confirm whether the first human was dead, the fact that they weren't may be the only reason some peaceful resolution can be attained one day...unlikely, however.
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Gaster goes and makes some coffee actually he just gets a coffee machine maker
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After watching the eighth human RESET their genocide route ad nauseam, a lone scientist decides to pull in another human, far from their reality, 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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The spirit calling herself "LADYFLY" tries to see where Kris is coming from, and realizes why she's truly here as she travels through the town's church with the Fun Gang. And it has nothing to do with religion.
(Scattered novelizations of moments in Chapter 4, with a heavily dramatized player perspective. Contains speculation-based plot details and canon-compliant non-canon.)Series
- Part 3 of Deltarune: Lady Luck
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Tails and Alphys love story by RisingTails
Fandoms: Sonic the Hedgehog - All Media Types, Undertale (Video Game)
15 Feb 2026
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Tails and Alphys start to notice something between them
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You were a sane, normal, and very sane human with modest dreams of making your way in Ebott through hard work, thrifty living, and good manners.
W. D. Gaster was the ruthless head of the Gaster crime family with modest dreams of upending Ebott through magic, science, and murder.
Six months after returning to the city you once fled, you found your ticket to mundanity in a steady job in the Underground. Six seconds after meeting a suspicious human in his territory, Don Gaster found his ticket to power in you.
A tale of two weirdos fighting and falling in love.
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Half-Tale: The Fallen by HolmesJaw
Fandoms: Undertale (Video Game), Half-Life (Video Games)
15 Feb 2026
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Summary
Corporal Adrian Shephard, a US Marine Corps soldier assigned to the HECU division, was sent off to Black Mesa for 'cleanup duty'. Despite the hell he went through, the marine somehow manages to escape the dangerous, alien-ridden facility against all odds and, after being 'detained' by the ever elusive G-Man, is then assigned a new mission many years later... to the UNDERGROUND!
Accompanied by Chara Dreemurr, the first fallen human turned apparition, the two journey through the unprecedentedly large Underground for one, very specific goal... but what exactly was it? And is that all there is to it?
In... time, all will be revealed.
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so raise your blade (and play your part) by Anonymous
Fandoms: Stranger Things (TV 2016), Deltarune (Video Game)
15 Feb 2026
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Twelve days before Christmas, a freak snowstorm would hit New York. Eight days before Mike Wheeler was set to go back to Hawkins for the holidays, he went missing.
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mike finds a shadow crystal, starts going insane, and maybe sorta becomes the roaring knight of this timeline
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it's MY au and i get to decide how shadow crystals work here
no knowledge of deltarune is required to read this but i'd recommend playing it or at least watching a playthrough first because it's such a peak game
[i have no idea where this came from. also too many people i know irl have figured out my ao3 user so. hi from anon... haha isn't it funny that deltarune also has at least 3 mikes isn't that crazy
and to those who have read the fic that inspired this i say: uh, hey, maybe things took a turning left at the crossroads route right now (imagine the "turning left at the crossroads" in bright yellow obscuring the entire rest of the sentence so you can't even read it)]tags may change as i add chapters, i don't wanna promise anything that's not in here yet
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
15 Feb 2026
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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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Hope can be a difficult thing in the face of adversity. Hope can be painful.
For some, it's easier to let go of the pain of what could be different and focus on the wall of pain that is. For others, hope is needed to hold back the landslide behind a fragile wall, so they can keep moving forward and make that hope into the reality they want to see.
A very vague summary to avoid spoilers, because this is a continuation of a large cliffhanger in this series. Summary might change as I post more.
**This is NOT a stand-alone fic and can't be read as such!**
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A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
15 Feb 2026
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Years pass. People grow. The world moves on without you. The Angel grew content with that for a while. It still hurt whenever they thought of the world that had long banished them, but something new pulled them out of the depths. Now, the Angel walks amongst friends who swear that they will not be banished. Kris, Susie, and Ralsei mean everything to them. Maybe this time, their banishment doesn't have to be as set in stone as they thought.
The Roaring comes. The light falters. Everyone falls.
A desperate connection is established in an attempt to save what remains of the Angel. If they fall, all hope will be lost. The world that banished the Angel long ago has forgotten them, but they have not forgotten it. This connection will have to be enough. Even if the rules have changed irrevocably, the Angel's one goal remains the same: Find them.
Series
- Part 3 of Clawing Toward What Hope Remains
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I Wish I Had The Words by EtterathHasFallen
Fandoms: Deltarune (Video Game), Undertale (Video Game)
14 Feb 2026
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Everyone knows the local mailman, the one who lives in the dump (not by the dump). And everyone knows he'd rather stay underground for eternity. It's safer, after all. Why bother?
Once an abandoned CRT washes up in Waterfall, Spamton may or may not have to consider a few things. Surely, this warm feeling in his chest means nothing. And surely, Tenna's dream of Surface World fame doesn't involve him. Spamton has nothing to worry about.
Right?
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His hand touched that crystalline light that blocked his path. The barrier was as immense as the years they had been locked away. He looked back until he found the friendly silhouette of the king drinking tea, his melancholy eyes fixed on the cup. His soul ached.
He was going to save him. Him, everyone. He was determined to do it. Even if death was no longer the worst fate.
Series
- Part 6 of Bilingual fanfics.
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Su mano tocó aquella cristalina luz que impedía su paso. La barrera era tan inmensa como los años que llevaban encerrados. Volvió la vista hasta que se encontró con la silueta amable del rey tomando té, con esos ojos melancólicos fijos en la taza. Su alma dolió.
Lo iba a salvar. A él, a todos. Estaba determinado a lograrlo. Incluso si la muerte dejaba de ser el peor destino.
Series
- Part 5 of Bilingual fanfics.
- Language:
- Español
- Words:
- 14,267
- Chapters:
- 6/?
- Hits:
- 39
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How long had it been before their awareness of self finally returned?
Ade fell out of their reality, nearly shattering across it as they did so. The void tried to take their mind. But they struggle on with hope crossed their heart.
Instead, they are forced to take on the role of Angel; guiding three heroes through prophecy.
Is it worth sacrificing the life they could have in hopes of going back to the one they lost?
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The first glow of day tinted the curtains amber. For once, Gaster was the first to wake up. His mind drifted away from his dreams and into the waking world. Thoughts of perfect omelets and heart-shaped waffles came and went. Grillby was peacefully asleep next to him, his arm pressing into Gaster’s. Now, while Gaster would love to laze around in bed, there was work to do. It was Valentine’s Day after all.
(In which Gaster sneaks out of bed to surprise Grillby for Valentine's Day)
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INT. TV WORLD - MAIN EVENT - EVENING
Gossip and cheer, lights and action- two darkners sit across from each other in the buzz of it all.
SPAMTON
[Listen, television's the premium medium! I'd be a real fool to not take the opportunity! Especially for an ad slot on your show. I promise ya, with the sponsorships and everything, it's good money; new prizes for your contestants, shiny cars, all that jazz. Big Shot Autos is sure to have a place with you. Whaddya say?]
TENNA
Hm. There are plenty of others who fight tooth and nail for the slots on my show. Why should I consider you above them?
SPAMTON
[Hey, I'm the Big Shot of Cyber City. You don't wanna pass me up, I can guarantee you that.]
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A failed salesman. That’s all he is. That’s all he’s ever supposed to be. At the whims of the will of a Lightner’s pen, he is nothing.
But what if he could be something?
Something big. Something bigger.He wants it all.
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A prequel, of sorts. Or at least the imaginings of one. Framed around the lens of one Spamton G. Spamton in screenplay format. +I include drawings sometimes :)Series
- Part 1 of His Dialtone
- Language:
- English
- Words:
- 1,510
- Chapters:
- 1/?
- Hits:
- 4
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The Angel has been drifting through worlds for as long as they can remember. Rarely acknowledged, and usually hated if they are. The Angel wants so desperately for a world to live in, a life of it's own that it didn't take from another.
So when the good doctor created that connection and promised a body of their own, and a world to live in, they jumped at the chance.
But when things went wrong and their hope stolen away, the Angel had to fix it themselves.
They would earn their own life with their own efforts.After collecting every crystal, every egg, and the knowledge of how to get their body back, they go to finally meet with their desire.
But the friends they tried to make and the cage who took away their chance at freedom won't make it simple.
They can only hope that they will listen to their side of the story.Good luck, ANGEL. You'll need it.
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Angel tries to get their body back, but everything goes horribly wrong for everyone because they can't help being flawed teenagers with too much baggage. Eventually they get over it and fix it. Eventually.
(Also as this is my first real work, I will make mistakes. So call them out for me please and make suggestions!)Series
- Part 1 of Angel's Reverie