1 - 20 of 1,279 Works in Undertale Yellow (Master Sword Video Game)
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Call for Justice by TheDoctorWD
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game), Deltarune (Video Game)
07 Dec 2025
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Summary
Monsterkind is finally free. Everyone is at the surface now. A happy ending is it not? To the little cowpoke’s surprise he is alive again! And it seems he was not the only one that was brought back to life.
Clover may not know why he’s alive again but one thing for sure is that going on another adventure wouldn’t hurt him at all, it’s time for him to bring Justice once again. Meanwhile the darkness seems to grow darker, yet darker.
Series
- Part 2 of Fractureverse - UT/UTY/DR
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【Clover×你×Flowey】不××就出不去的房间2.0 by Lynna153
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale Red&Yellow
07 Dec 2025
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Summary
人不能两次踏进同一条河流，却极有可能两次踏入同一个陷阱。
Series
- Part 8 of UTY乙女向
- Language:
- 中文-普通话 國語
- Words:
- 6,691
- Chapters:
- 1/?
- Hits:
- 5
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Summary
Someone powerful is tired of the bad endings. Time to take fate into their own hands.
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Deliverance From Self-Destruction by Agent_ArcticFox
Fandoms: Undertale Yellow (Master Sword Video Game)
07 Dec 2025
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Summary
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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Unavoidable Outcomes by Crystalight532
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
07 Dec 2025
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Summary
The Multiverse isn't as unreachable as one might think. Sometimes, all it takes is one aware person to tip the scales for another to find out about it. But when one isn't ready for it, returning to their own world is relieving and best for the psyche.
Humanity's thirst for knowledge is near insatiable. How far would they be willing to go to learn more about their new magical coinhabitants on the surface? How far would they go if they could weaponise their magic?
Series
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Noelle Becomes Brave by IllegalMeerkat
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
07 Dec 2025
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Summary
The world is on a collision course with the end of everything.
Noelle Holiday is attacked in Hometown while walking home, and after returning home a week later, she knows that something is wrong. Her mother isn't acting right, and there's something out in the woods around her house.
With all of her friends and family holding secrets, the Roaring looming overhead, and the knowledge that the world rests on her shoulders, Noelle forgoes her mental health to make a better tomorrow. She'll get stronger.
Whether her friends let her is another story.
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A Copykit in the Ketsukane Family: An Alternate Path by TheTakenCatking
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
07 Dec 2025
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Summary
This story is an alternate path for 'The New Kit in the Ketsukane Family.' Please read that one first before venturing any further into this work.
Series
- Part 2 of The New Kit in the Ketsukane Family
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Open the Light by SomeoneNotReallyNoteworthy
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
06 Dec 2025
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Summary
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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We'll figure it out by Doesntmatterreally
Fandoms: Undertale Yellow (Master Sword Video Game)
07 Dec 2025
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Summary
Clover, along with everyone else in their new home, the Wild East, gets concerned when Martlet doesn’t show up for her scheduled visit. The letters don’t seem to reach her either. Starlo, after grinding his teeth about it – since him and Martlet get along about as well as a person traumatizing children can get along with one who's against it – agrees to accompany Clover to her house. They hope it’s nothing serious…
It’s kinda serious.
- Language:
- English
- Words:
- 3,863
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 51
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
06 Dec 2025
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Summary
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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Another Phantom / Act 1: Intwined by CrumbleKoek
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
06 Dec 2025
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Summary
In a timeline where things kept being slightly off, the first drastic change happens when Ceroba succesfully gets to Hotland with Clover.
However, the consequences of this action slowly become evident, as things don't go as anyone involved could have planned.
Series
- Part 1 of Another Phantom
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Records of Underground by Magic_Hawk
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
06 Dec 2025
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Summary
Vane was perfectly content in his own little world of interests, his patience guiding him with his thirst for knowledge. But one day, his curiosity got the better of him and exposed a whole different world: The Underground. This is the story of the first human afterwards - the Cyan Soul of Patience.
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Martlet's Poor Judgement by JesterPippins
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
06 Dec 2025
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Summary
Two days. Two days after Martlets life was abruptly changed. She wishes nothing more but to rot and to isolate herself from the underground, but she still has to clock in for her shift. Doubts of her job spiral in her mind. And now, at the worst of times, Red has visited to learn more about the job.
- Language:
- English
- Words:
- 6,016
- Chapters:
- 1/1
- Hits:
- 31
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Tags
- Language:
- English
- Words:
- 1,050
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 27
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Undertale Yellow's Second Anniversary Week! (2025) by Oryans
Fandoms: Undertale Yellow (Master Sword Video Game)
06 Dec 2025
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Summary
A small collection of stories based of this year's UTY Anniversary prompts!
1. Family/Celebration
2. Fav UTY au (thats not your own)/Crossover
3. OC/Pre or post game
4. Relationship/Favorite memory
5. Favorite Design/Growth
6. Home/Headcanon
7. Remake your favorite UTY work (done by you)/SurfaceSeries
- Part 2 of Undertale Yellow Anniversary Fics
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Another Ending by Zekyn
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
05 Dec 2025
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Summary
What if one pivotal moment had gone differently? Chara and Asriel find themselves facing the aftermath of choices that could have ended them both.
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Adventure Tale by Kaboom91
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Adventure Time (Cartoon 2010)
05 Dec 2025
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Summary
After countless runs, something goes wrong, and now humans and monsters alike have been pulled into a strange new land with its own rules and its own dangers. Come Along With Me for the crossover nobody asked for, its ADVENTURE TALE!"
Series
- Part 1 of Adventure Tale Collection
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Hangover by OctavianClef for Prism001
Fandoms: Undertale Yellow (Master Sword Video Game)
05 Dec 2025
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Corruption Tale by TimeWitchHilda
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
05 Dec 2025
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Summary
What of instead of the Human Monster War A Virus took hold that slowly corrupted the Humans and Monsters of the world? What if When Chara Fell Into the Underground She merged with Asriel to try to save the world above? What if when every Human fell They tried to escape the corruption above? What if the Barrier was meant for a safe place instead of an imprisonment? All of these questions will be answered with Frisk who knows somethinf about the Virus that no one else knows. Maybe it's even something Chara knows to. Will these two Humans whose lives are a Century apart manage to save both the Underground and The Surface of this evil Virus?
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Hello I recently got into Friday Night Funken and I saw an AU with this Corruption story. And I think of doing something similar but not quite the same either. I hope you all enjoy.
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Deltarune FR: Don't go to the Bunker (Dessrielcember 2025) by LanceGlover03_Brakamonaga
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Dungeons & Dragons (Roleplaying Game)
05 Dec 2025
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Summary
In the early days of the friend group, four of the six bloodcrushers make their way to the mysterious bunker of Ebott Valley. What will they find down in this mysterious place? Is it really worth the dragon plushy, Dess?
This fic was made for Dessrielcember 2025, Day 4's prompt of "Don't go to the Bunker."
Series
- Part 2 of Deltarune Forgotten Realms