1 - 20 of 11,742 Works in Undyne (Undertale)
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One day, our main character decides to open up Undertale before going out with some friends, he leaves the game on when he leaves, and when he returns, he finds the game with completely new dialogue, but as he finishes reading it, he slowly falls unconscious until he wakes up in the world of the game he loved.
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It's been three years since you fell into the underground and found a family among the monsters of the Ruins. You love your life here with Mom, your ghost buddy Blooky, your prickly friend Flowey, and the host of Ruins monsters who have accepted you as their own, but things can't stay this way forever. Your friends deserve to see the sun, and there's a prophecy to be fulfilled and a barrier to be broken. Your determination pulls you onward.
The only trouble is that you'll have to make it through an underground full of monsters clamoring after the red SOUL in your chest, and each day as circumstances become more dire they lose a little more hope. This is a more desperate underground than the one you landed in. The odds don't look good for one pacifist child with a stick.
Of course, you aren't completely outmatched. You've spent the last three years training for this moment, and you don't intend to let anyone hit you.
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The world changed when the barrier broke. With the monsters and the child ambassador came an influx of new diseases that are barely understood. You're a young scientist and have been called upon to work with monster-kind to help treat these strange new conditions, but you begin to notice that you have changed alongside the world - more so than you could possibly imagine.
High jinks and low jinks ensue as you meet a particularly punny skeleton and his friends ;)
WARNING: contents include spicy bone-zoning, VERY slow burn, painful hanahaki experiences for the mc & more
Series
- Part 1 of Forget Me Not
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Kris discovers a world beneath the surface. One unlike anything they have ever seen. With it, they are given a suit of armor that grants them immeasurable power.
For their entire life they have felt useless. But with the armor, they didn't have to be Kris Dreemurr. They could be something else. Something more.
They could make a difference.
tl;dr - Kris becomes a superhero and fights crime in Hometown
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Twin Runes by Thealmoghtbeyonder2099
Fandoms: Undertale (Video Game), Deltarune (Video Game)
05 Oct 2025
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Twin Runes es un AU cómico en su mayoritariamente alegre centrado en los universos Deltarune y Undertale. Una fuerza desconocida ha provocado que aparezca un punto de conexión entre los dos universos, lo que hace que Frisk y la molestia fantasmal Chara tropiecen en la vida de Kris en uno de sus muchos reinicios (para gran disgusto de Kris). Se produce un caos que rompe el juego.
La traducciones del "los pájaros y abejas" hasta el "No sirve pa' nada" no son mías. Del resto de traducciones si son de mi autoría
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There’s a limit to the things you can do today. Accepting this is healthy. Thankfully, there’s always tomorrow.
It has been five months since the barrier broke, and Monsterkind was freed. Frisk is trying to make sure no one gets left behind. Some Monsters willingly stay behind, and others struggle to make the move. After some failures and successes, Frisk will begin to realize that getting to the surface is not enough. To save Monsters, no, to truly save everyone, it takes more than just a little sunlight to solve problems.
It takes risks. It takes knowledge. It takes patience. It takes friendship. And, sometimes, it takes someone else to help.
A post-pacifist ensemble story that focuses on Frisk still trying to SAVE everyone- monster and human alike.
- Language:
- English
- Words:
- 5,335
- Chapters:
- 1/?
- Kudos:
- 4
- Hits:
- 19
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A field filled with dust and dried blood. A field where the last words and cries for help were drowned by the hits of sword blades.
The war between monsters and humans is underway. Started with fear and a feeling of insecurity, and it could end in any way. Both sides having only one goal: to save their home, from people they once called their friends.
Two sides, one winner and no matter the cost.
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To steal a purple soul (And hold it gently in your hands) by Feniksiara
Fandoms: Undertale (Video Game), Underverse - Fandom, Xtale - Fandom
05 Oct 2025
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To hold admiration towards a man who never interacted with anyone was foolish. To want to get closer to him despite knowing what he's capable of was even more so. But was it truly so foolish if her devotion was eventually noticed? Perhaps the reclusive man held more in his heart than cold calculations, if only for one person. One woman, who managed to steal his soul and held it gently despite his crimes.
Or: Reader is determined to help in any way she can and manages to slowly slip through XGaster's walls and into his soul. Neither knows what to do and is too blind to notice the pining. XAlphys and Ink are amused, until they aren't.
Series
- Part 1 of Feni's XGaster simping corner
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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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The barrier stood before you. Its white glow radiated throughout the expansive room, beckoning you forward, urging you to shatter it.
“Nah, I don’t think I will.”
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Or alternatively:
The reader decides the Underground is WAY better than the Surface and doesn't set the Monsters free. Cue shenanigans with Flowey. -
Kinktober 2025 by scratchybrainz
Fandoms: Undertale (Video Game), Team Fortress 2, Dangan Ronpa: Trigger Happy Havoc
05 Oct 2025
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It's kinktober. Any and all fandoms I can think of will be included.
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A sense of doom hangs over December Holiday. Summer is ending. Asriel is out of her league. Life is slipping away from her. But when a meteor crashes on the edge of Hometown, an older, traumatized version of her sister Noelle emerges from the smoking crater clad in bloodstained white. Destiny begins to shift. Perhaps things will be better in this world. (But probably not.)
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The Barrier's broken and the monsters are stepping out into a Surface they've dreamed of for years uncountable and forgotten. The human that helped them break through is at their side, just as unfamiliar and unsure about the Surface as they are. Upon first glance, the monsters stumble upon another human as they emerge from their prison. A human like any other, but to the monsters 'any other' human has been instrumental to regaining their footing on the Surface. Will this one be too? And are blushed cheeks something every human wears on the Surface? Come along on a journey with humans trying to understand magic, and the memories that follow. Following not as candles that warm, but as shadows that haunt. The human condition changes ever so much when exposed to magic, but how much? And how much can one human take before becoming determined?
A smorgasbord of events from tidying up a goat family to magic of the soul!
This is an amalgamation of the One Falls series into one story with the chapters
1-30:One falls, more rise
31-61:More rose, one remains
62-104:One saved, more left behind
104-120:One Falls: Change Of Heart(s)
121-181:More invited, one to celebrate
182-428:Soul of our Hearts -
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Summary
A perverted love child between Undertale and Overlord consummated with boredom and edgy hormones.
Osoma, a game that you had developed alongside your fellow developers, is scheduled to shut down and have all of its servers wiped today. Saddened to see your friends leave and to have something you have worked hard on end you decide to use the last few minutes of your time making a set of devilishly handsome Undertale NPC characters. When you were done you accepted what you had made and decided to stay in till the timer hit zero. Unfortunately, even though you were done with the game the game itself did not seem done with you. Now trapped and surrounded by your new creations giving you all sorts of devious ideas you need to decide what to do. Do you go along with what they say and take over the new lands that popped up around the original land of Osoma itself, find a way to get back to your own reality, or allow the first high level monster to kill you?
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You and Frisk decide to take a day off to have a picnic in Mt. Ebott, something to take your mind off work while waiting for winter.
So why, why are you now on the police office?
Why are you putting missing posters all around the city?
Why did you take them there? Where are they? Why did your worst nightmare become something real?Where are they?
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I don't have a summary i just pulled this out of my ass but if you like a slow burn with a Lot of Words and Feelings™ and Sans pleaseee give it a try. -
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Just a normal day, Asgore and Toriel have parted ways, but still held together by old experiences and memories
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Timeless Justice by TheDoctorWD
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
05 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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In the end, no one remembered the Judge in the golden hall, nor the Angel who scorned all. For nobody came. Everyone we loved, everyone who loved us, had turned to dust.
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I know I know, it's supposed to be kinktober, but hey? Let's do Ausctober, sha'll we? sksks (CANCELLED)
there is no smut! but there will be some smoochie :D
different chapter, different au, different theme!
let's begin, sha'll we?
NOTICE!: Fuck this, my RL ain't allow me to do it, UGH I HATE IT SO MUCH but... I'm not gonna abandon this, instead, I'm gonna fill this with oneshot! or some scramble
Sorry I give up huhu
Chapter: 1. Remembering you (ut sans/reader)
Chapter: 2. A meeting with you is sweet… more sweet than the dessert (swap sans/reader)
Chapter: 3. How far? Another universe, baby. (fell sans/reader)
Chapter: 4. The way to the hospital (HT sans/reader)
Chapter: 5. - -
A Copykit in the Ketsukane Family: An Alternate Path by TheTakenCatking
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
05 Oct 2025
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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