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Save a Horse, Ride a Cowboy by average_alternative
Fandoms: Undertale Yellow (Video Game), Undertale (Video Game)
17 Dec 2025
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Living in the Wild East with Starlo was great. For the first time in a long time, you found yourself truly happy. It seemed like coming to the Underground was the best decision of your life.
That happiness is threatened when the Asgore finds out that a human has been living in his kingdom for months without being caught.
OR:
I turn my fic that originally started out as smut oneshots into a fleshed-out story with angst, fluff, and yes... still more smut.
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Under Their Tails by TebTebmylittlepony
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
17 Dec 2025
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Brought to life again as a big dicked version of The First Human in one of his favorite games, James will make sure his perviness and loving warmth will allow him to get with these strangely lewded up characters, while also making sure not to make the same mistake the original did.
After all, why would he want to leave this Underground?
Notice: First chapter is more of a notice for people that are interested in this fic before I make an actual chapter, if you don't click on it or do and decide this isn't for you, then all I can say is I hope you have a nice day.
Though I'd highly recommend you do so i can clear some stuff up for this fic
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Bells and Feathers by OctavianClef
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
16 Dec 2025
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Ceroba and Martlet are making a home for themselves on the surface, enjoying their freedom and mourning their losses. But things can never be that simple. Can they?
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Deltarune FR: Summer Festival by LanceGlover03_Brakamonaga
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Dungeons & Dragons (Roleplaying Game)
16 Dec 2025
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With a few days until the summer festival, the Bloodcrushers are really confident in their song. However, undenounced to them, this might be the last time they perform. The question is, can they change Toriel's mind? Can a mother's love overcome the religious programming she placed on herself?
Series
- Part 3 of Deltarune Forgotten Realms
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The Devil (Flowey) on Your Shoulder by Kitstenk
Fandoms: Undertale Yellow (Master Sword Video Game)
16 Dec 2025
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Clover gets moderately hurt falling into the Dark Ruins. Instead of resetting, Flowey gets the idea to offer his help a little (a lot) more directly than usual.
This changes everything and nothing at the same time.
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Someone powerful is tired of the bad endings. Time to take fate into their own hands.
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Love me at my worst by Local_Eldritch_Raven
Fandoms: Undertale Yellow - Master Sword (Video Game), Undertale Yellow
16 Dec 2025
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The anniversary of a wretched, terrible day is fast approaching. Dalv, haunted by memories, finds himself spiralling once again into old habits. Starlo however, will not allow that. He decides to stay with Dalv and help him through this horrific time.
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Call for Justice by TheDoctorWD
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game), Deltarune (Video Game)
15 Dec 2025
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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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Soulbound by Tricky_17
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game)
15 Dec 2025
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After the events of the true pacifist route in Undertale Red & Yellow (with Frisk choosing to stay with Toriel):
Monsterkind has been living peacefully on the surface among humans ever since a young child, Frisk, saved them from their long captivity in the underground.
All is well for Frisk and their friends. All except Clover, a young boy who was recently brought back to life by Asriel Dreemurr as gift for his selfless sacrifice in the underground. While he appreciates his second chance at life, he has never gotten over a friend he wishes he had never had to say goodbye to. Chara Dreemurr, the first human to fall into the underground, and one of two ghosts, alongside Clover, who guided Frisk through their journey, has not forgotten about her friend either. Unlike Clover, Chara was not given a second chance at life, and continues to watch over Frisk on the surface. While she enjoys Frisk’s company, Clover has always been at the forefront of her mind. Unknowingly to Clover, there is one way for Chara to return to the living realm. However, Chara has been hesitant to act on this.
After all, such an act would require a permanent marriage of souls.
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Clovers and Feathers by WaxedLightlyWeatheredCutCopperStairs
Fandoms: Undertale Yellow (Master Sword Video Game)
15 Dec 2025
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It's been a week since Clover chose to live with Martlet after the grand confrontation against the 'Roba. Hijinks occur.
or: i make bird-human fluff bc i need more
edit: oh god it's a full story now
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Undertale Swan Lake by Beethebeebeebee
Fandoms: Undertale, Undertale Yellow, Undertale... Blue???
15 Dec 2025
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Lyla Arel is a Prodigy.
Only 7 years old and shes performing as cygnet number three in Ebbot City's Swan Lake.
But sometimes things don't end the way we want them to.
Sometimes we fall and hurt ourselves.
This is the story of the 5th fallen child.
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Return To Form by EnemyCactus
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
14 Dec 2025
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Summary
The barrier was shattered and monsterkind finally got their freedom, but what of the humans that came before?
They deserve a happy ending too.
But with so little power left remaining after destroying the barrier, a half-measure would have to be taken.
Better than nothing, right? And for some of them, much more preferable to how they were before and certainly during their deaths.
The Sixth and final SOUL is the last to awaken, and by that point, things have been quiet in the Underground for quite a while.
But there is still one more thing to be done, one more person to save, and in many ways they're tied to that Sixth SOUL as well as the Underground's self proclaimed caretaker.
A second chance and a happier life awaits Clover and Kanako if they can just grasp it.
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Deliverance From Self-Destruction by Agent_ArcticFox
Fandoms: Undertale Yellow (Master Sword Video Game)
14 Dec 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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proof of concept by potatofever
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
14 Dec 2025
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Up on the surface, long after monsterkind had been freed from the Underground's clutches, things couldn't be greater. Sure, there's the occasional legal trifle that their ambassador has to delegate, but what's life without its bumps? Everything is absolutely phenomenal. Frisk Pérez, Chara Dreemurr, Asriel Dreemurr, and Clover Zenith think so too.
As they will do what they must—as the Angels of Monsterkind—secrets and all.
After the events of the true pacifist ending of UNDERTALE: Red and Yellow, Chara, Asriel, Clover and Frisk, now living and breathing in unison, grapple with peace and the consequences of guilty conscience.
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
13 Dec 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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Consequence by Anthrax13
Fandoms: Deltarune (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune Yellow - Fandom
13 Dec 2025
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Summary
An Angel scorned, with tears of fire;
The bitter path; of thorny mire;
All countdown to the Earth's expire.A soul of Justice; borne true and bright.
One of Compassion; with monstrous might.
Usurped from deepest, darkest black;
A Prince of hollows, bearing lack.Two Hearts;
Two Ends.
They play their parts,
In rage-wrought bends.
From burning vengeance, a twisted boon;
Faux transcendance, of DELTARUNE. -
The ‘figuring it out’ part by Doesntmatterreally
Fandoms: Undertale Yellow (Master Sword Video Game)
13 Dec 2025
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An unexpected, somewhat Kafkaesque change leaves Martlet doubting her own identity. She was always the talkative and expressive one, a bit of a scatterbrain. Now all she’s seemingly allowed to have is that last part, the part she honestly would’ve preferred to be thrown out the window instead. She’s not sure how to deal with this until her favorite kid and their favorite manchild show up at her door and offer their help. Well, this was ultimately unavoidable, wasn’t it? Now she has to adjust to her new reality until maybe one day she can recognize herself again.
Series
- Part 2 of Martlet, just different
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Justice Evolved by The_Spar1an
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Undertale Red & Yellow (Video Game)
12 Dec 2025
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Summary
Clover remembers.
After spending quite some time dead, He finds himself with memories he'd rather not have.
Memories that tell him who he truly is.
Memories that haunt him.
edit: lowkey put me on the stuff I was on when I wrote this summary.
Anyway, basically Clover remembers resets, especially genocides. So he basically remembers how to use his powers from previous runs as well, and then la tee doo dee dum, and bam. Justice Evolved.
If you're curious enough to have questions, maybe read the fic. It'll boost my ego. (please)
(edit 2) Disclaimer: if you want to read for cocoapowder, cocoapowder chapters will be released at a later date. As of this edit, the relationship between Clover and Chara has yet to be explored.
(edit 3) despite "Teen and up Audiences" rating, please note that It's catered more towards 14+ ages.
------------------------------This work will contain Original characters for the sake of worldbuilding, which WILL play major roles in the story.
This is an alternate universe to Undertale Red and Yellow.
This work will be from Clover's POV. (written in first person, not second person, aka "I" instead of "You") -
UNDERTALE YELLOW - CORRUPTED HEARTS by Mortisblade
Fandoms: Undertale Yellow (Master Sword Video Game)
12 Dec 2025
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CLOVER, what would happend if Clover never gave up their soul in time. What if they've lived? What if that one action changed everything.
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A Second Chance by GooseBonkcena
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
12 Dec 2025
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Summary
(this is the old version of the fic a rewrite is in the works)
Chara and Clover are offered a new lease at life in the Deltarune universe. also they are totally down bad for each other, Noelle and Susie steps in and become wingwomen.
this takes place in red and yellow timeline too.