1 - 20 of 193 Works in Axis (Undertale Yellow - Master Sword)
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Summary
Three years ago, a brother left his sister to search a mountain that no human has ever returned from.
Three years later, the sister, desperate for answers, follows her brother's footsteps.
The two meet again, but the result is likely the most hectic two weeks of their lives. And one of them has already lived an eventful life.
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The fire that won't let me die by anonymousyellowlizard for TGClmao
Fandoms: Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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“That’s not a monster, Kanako,” Chujin puts a hand out for her to take, “That’s a human. Come here, get away from it.”
“It’s not mine…” Quaver mumbles. They look at the kind monster pleading. “It’s not my dust… I had to…”
She moves closer to them.
“Kanako!”
What if Integrity got to survive the Snowdin Incident?
Series
- Part 15 of Kink/Whumptober 2025
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Just an ordinary trip to the underground.
Oh yeah! And Frisk has the ghosts of all of the past humans in their head! What could possibly go wrong!
Frisk and the humans adventure around the underground, and help to tie loose ends and help each other with their problems.
Series
- Part 1 of Undertale: Sevenfold
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Deliverance From Self-Destruction by Agent_ArcticFox
Fandoms: Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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Alexander Koskinen is not a perfect man, but he’s lived his life to what he believes is the best he could. But after falling into the underground, that belief is shattered, and the guilt that has built up over the years has come crashing down, a weight he can no longer bear alone like he has for so long. Now it’s up to Chujin Ketsukane, patriarch of the Ketsukane household, to help pick up the pieces of this lost soul’s life, lest he be consumed by the past that’s been haunting him for all these years.
Series
- Part 1 of UTY: Absolution
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Diving for Justice, Freedom and Managed Democracy by Dangeresque_On_Ice
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game), Helldivers (Video Games)
17 Oct 2025
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The Monsters were dead.
They must have been, the Federation of Super Earth had said so; annihilated during the Great Galactic War along with all the other threats to Managed Democracy. So Clover was understandably confused when he set out to find the five missing Cadets only to discover a whole society of Monsters sealed underground.
What’s more, these Monsters were nothing like the tyrannical, Freedom-hating killers history had portrayed them as.
Things just weren't adding up. But why? It’s not like Super Earth would have lied, right?
Now with a TV Tropes page: https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/DivingForJusticeFreedomAndManagedDemocracy
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Open the Light by SomeoneNotReallyNoteworthy
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
16 Oct 2025
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Happiness was rare for Clover in their life, something he now never expected with his sacrifice.
Kanako thought her happiness was over with her grave mistake.
Yet here they were, meeting each-other outside the bounds of reality. The puzzle, however, is far greater than anyone realized. Not everything will stay forgotten.
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A controller's dismissal by Sirsonan
Fandoms: Undertale Yellow (Master Sword Video Game)
15 Oct 2025
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Flowey wasn't going to RESET Clover this time. Even he has his limits before his patience runs thin. Although time RESETs anyways. Flowey figures out who used HIS powers and scares them into leaving. This run faces the consequences of that action.
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Double Jeopardy by Oryans
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
14 Oct 2025
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Clover climbed Mt. Ebott to find to the children who'd gone missing there. Against all odds, their brother climbs up after them.
Series
- Part 1 of Against Better Judgement
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A world where your impact was heard elsewhere by dream_sky
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword)
12 Oct 2025
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"A long, long time ago, another human fell down here."
"Injured by their fall, they cried out for help."
"...But nobody came."
Or
Chara didn't wait as long for help, and by the time Asriel works up the courage to investigate the cry, they're already gone. The butterfly effect (and the addition of a bunch of my headcanons and ideas) does the rest.
(currently in hiatus purgatory)
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
11 Oct 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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Timeless Justice by TheDoctorWD
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
10 Oct 2025
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After countless resets and endless repetition.. something has changed. The timeline has began shifting, changing its path for the first time in a long time. A new path Flowey hasn't seen before.
Well, it might take Clover longer to reach Asgore but Flowey has all the time in the world after all. And seeing something new finally happen has piqued his curiosity. Drawn in by the unfamiliar, Flowey watches with morbid fascination as Clover is not able to give up his soul this time. Encounters shift, monsters react differently, and the world itself begins to remember things it was never meant to.
Events shuffle. Characters act out of turn. Rooms appear where there were none. And for the first time in countless resets, Flowey doesn't know what comes next. Clover's fate is uncertain. Though Flowey knows he will get those human souls, no matter what.
Series
- Part 1 of Fractureverse - UT/UTY/DR
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it's a lie that i know you by ceruleanwarbler2
Fandoms: Undertale Yellow (Master Sword Video Game)
08 Oct 2025
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Kanako and Axis try to move on from losing each other.
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Did I do something wrong? by YouveGotToBeKittens
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
07 Oct 2025
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Clover, after an aborted genocide, has Flowey reset. Somehow, though, they start to remember their past attempts.
Fluff ensues.
Also angst. -
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With a toy gun in hand and justice in his soul Clover embarks on his mission up Mt Ebott to find and rescue five missing children. But all too soon he becomes a pawn in a plan to steal the fallen human’s souls. Trapped in an endless cycle of death and reloading Clover must find a way to remember the past, evade Asgore’s armies, defeat his Royal Guard’s, liberate the fallen humans and end the death cycle he’s been trapped in. But will he have the strength, will, and determination to succeed? Or is his fate wind up like all the others who came before?
Series
- Part 2 of Fallen Justice
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Concept: UTY AU from the perspective of a military veteran investigating the disappearances of the eight human children last sighted near or at the base of Mt. Ebott.
After having completed her eight years of service, she goes home to find her younger sibling has disappeared. As she inevitably finds and descends the entrance to the underground, PTSD surfaces. This soldier has seen the worst of humanity, and battles the sins of her past actions.
Clover has made a sacrifice, but things end up differently than what his friends expected. Having found an amnesiac Fox monster, the Ketsukane family takes him in as their own.
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Desert Sanctuary Guidebook by KarmaSpidr
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
04 Oct 2025
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Clover doesn't give up his soul because justice still needs to be delivered.
The Wild East, and later practically the entire Dunes, declares independence. They declare that any human within their borders is under their protection.
Civil War looms over the Underground.
Would you like to see what happens?
Note: This is NOT a story. This is an archive containing information about my AU, Desert Sanctuary. I might write a proper story in the future, but for now, this is where you can read about the narrative, the characters and how this massive change affects Frisk's journey.
Fanart and other fan works based on Desert Sanctuary are welcome and encouraged
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Shattered Decade by An_Overly_Curious_Revolver
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
02 Oct 2025
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Ten years.
Clover has been trapped in a loop of running through all the different routes of Undertale Yellow for ten real-time years.
Then, during one of the thousands of hateful massacres that have played out, something changes.
Right at the end of the bloodsoaked path, unable to suppress a guilt gnawing at them from within, Clover turns their gun on the yellow flower a touch early.
The gunslinger fights Flowey with an equal level of Determination. The save file is damaged in the crossfire, and the save system is destroyed.The data corruption sends Clover through the void, all the way back to just outside Mt. Ebott, and also ages the gunslinger as well as the world itself by ten years.
While in the void, he sees fragments of events in the other routes, and a vision of a person he's never met before trapped in a certain laboratory.Burdened by the weight of his sins from his last journey, and armed with a vastly more mature body and mind, the fully grown cowboy decides he has to do things differently this time.
No more SAVEs. No more LOADs. No more RESETs.
All actions have permanent, irreversible consequences.
This is their final shot.
Do or die. -
It's Raining Somewhere Else by ButternutWillow
Fandoms: Undertale (Video Game), Splatoon (Video Games), Undertale Yellow (Master Sword Video Game)
01 Oct 2025
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The rain brings back memories of the past…
TLDR: anthology series inspired by ArtsyRean’s cover of It’s Raining Somewhere Else, featuring what’s more or less the main cast of Splattale.
Chapter hints/order:
Kanako: song’s vibes
Clover: I’d forget the days and names
Frisk: took her hand dancing all night long, hope she’s fine, as I share this bliss of mine
Chara: take a sip, wine is so bitter and it’s drippin’ perfect thing, for a night like this
Melody: guess I’ll leave, time to move on, leave a tip in case I don’t come back
Asriel: plastic roses so close to our noses and yet obviously, it ain’t quite the sameSeries
- Part 4 of Splattale
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Supernova by EmbretheWorld
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
22 Sep 2025
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Supernova - when a star runs out of fuel, its core collapses, resulting in an explosive demise.
The death of North Star and the rebirth of Starlo.
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Двојна Монархија by Ramencubed
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
20 Sep 2025
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Ђиленин сан месецима је био да, у неко следеће доба, се попне на планини Ебот која се налазила у близини његове домовине... Али су животни услови код куће га натерали да ту "експедицију" уради раније него очекивано, као нека задња жеља. Није уопште очекивао како ће да буде резултат његове експедиције.