1 - 20 of 60,425 Works in Undertale (Video Game)
Navigation
Listing Works
-
Tags
Summary
After the events of Multiverse Madness, with Shattered and Reality now back in their own multiverse, the fighting is quick to once again break out. Reality explores and learns about his multiverse and the damage Shattered has done to it and attempts to save it, while Shattered continues his efforts to stop Reality and get him encased in stone again. The two of them make allies and enemies, Reality making friends and becoming part of a found family while Shattered follows in Nightmare's footsteps and manipulates his allies into thinking he cares for them. Traumas are experienced, friendships are strained, loyalties are tested, and deaths are witnessed and grieved for. It's an emotional rollercoaster, so be prepared for what happens, as it's not for the faint of heart.
Discord server: https://discord.gg/wQfvxyEuvj
Tumblr in case you guys want to make fanart: https://www. /werecat1234
Shoutout to my beta readers Ali, Rain, Iluvdragons, Prophet, Poki, Clichély, and Nova! You guys are awesome! Thank you guys so much for beta reading this for me and giving me feedback on the story, you have no idea how much it truly does help!
Series
- Part 4 of Werecat's UTAU Megaverse
-
Tags
Summary
The end times are here. Nuclear weapons took out a good chunk of the American population and killed others through radiation or the nuclear winter it caused. But Cross is still alive. He was living with his mom down in Mexico when the bombs went off, and now needs to journey across the country to find his family. Along the way, he meets Killer and his son Crescent.
Feelings, sadness, horror, gore, and potentially romance ensue. Oh yes, also there are zombies.
- Language:
- English
- Words:
- 9,956
- Chapters:
- 1/3
- Hits:
- 0
-
Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
29 Oct 2025
Tags
Summary
New kinktober! One chapter a day for the entire month!!! With a list I made myself, very excited to show everything I've written.
Just like the other ones every chapter contains some form of hypnosis/mind control/brainwashing. I'll do my best to tag but i can't tag absolutely everything so look at the warnings at each chapter or in the table of contents.Series
- Part 14 of Undertail hypnosis series
-
When pure Lust breaks a Mobster's mind (Mob/Lust) by Chris_ghosty77
Fandoms: Undertale (Video Game)
29 Oct 2025
Tags
Summary
Mob has been in worse situations before, he's sure they'll get out of this mess. Lust, the prostitute keeping him company while waiting for the police to release them, isn't so sure. The officers have a devious plan to make sure neither prisoner will ever be the same when (if) they get released. Now with the possibility of choosing the poor skeletons' fate!!!
Warnings in the tags.Series
- Part 15 of Undertail hypnosis series
- Language:
- English
- Words:
- 4,405
- Chapters:
- 4/4
- Hits:
- 0
-
Tags
Summary
A Supernatural Au of the Sans Aus (they're human in this don't worry, they all have human names too). This story is written in 3rd person view, having the perspective of multiple different characters. The most common POV will be Dolores' and Silvios' (Aka Human Dream and Human Swap) In this, magic exists naturally, with it being most seen in fae, elves, and vampires. Fae and elves have the most powerful magic next to other magical creatures that are thought to be myths. Humans had been living just fine for decades, as many vampires were wiped out, same with all strands of werebeast blood. However, the population of both ad managed to skyrocket within the last decade, proving to be quite the issue. Despite the modern technology, humans have been unsure of how to deal with the rising threat of supernatural. Some turn to their religion, some turn to arming themselves, and others hide away in their homes like it's a pandemic.
Or if you want a short version: A Sans Au Supernatural Fan-fiction where they're humans, dealing with the struggles of surviving alongside one another.
- Language:
- English
- Words:
- 5,356
- Chapters:
- 4/?
- Hits:
- 31
-
Tags
Summary
Après avoir découvert que tu étais enceinte, ton partenaire t'abandonna
Tu croyais que tu allais te débrouiller en solitaire
Mais la vie décida autrement lorsque tu croisa le chemin de 5 squelettes, ou plutôt 6, qui décidèrent que tu leurs appartenais
Ils ne s’attendaient pas à s’attacher et tu ne t’attendais pas à changer
/
After discovering you were pregnant, your partner abandoned you.
You thought you were going to manage on your own.
But life decided otherwise when you crossed paths with five skeletons, or rather six, who decided you belonged to them.
They didn't expect to get attached and you didn't expect to change
/
Disponible dans les deux langues
Available in both languages -
Tags
Summary
The thing about soulmates is, no matter what pries them apart, they always...always find a way back together
Chapters 1-3: Prologue
Chapters 4+: Main Story
*This is a rewrite of I Have The Power of Gaster AND Anime On My Side. Same concept, with a bit of a serious feel.*
**Please be aware that this is not like my usual reader-inserts!! This story is in 3rd person pov, very vague description of a female reader. Unnamed (Pet names only). No use of y/n, y/e/c etc.**
-
Tags
Summary
Positivity falls and Destruction is left to pick up the ravaged (and melting?) pieces.
-
Tags
Summary
A mix of fluff, angst, and crack! Universe and genre used will be in each chapter's author note, along with chapter specific warnings.
-
Tags
Summary
This follows killer mainly, killer is trying to leave nightmare's gang after finding out that he's not the first eventually when he does leave he encounters many problems and a safe place.
This does tie into the diaries and katherine might appear but she will not play a huge role
I'm not the best at writing fix but I'm trying so if you have anything that you want to say and you critiques or anything let me know because it would help me greatly I also have trouble with being consistent so bear with me here
- Language:
- English
- Words:
- 457
- Chapters:
- 1/?
- Hits:
- 2
-
Tags
Summary
“Thanks, Paps.” Sans replied, taking the blanket and dropping it over the sleeping human. Proceeding to give the child an affectionate pat on the head. The sight made Papyrus think of when he and Sans were younger.
Seeing his brother in such a state filled Papyrus with his own feeling of euphoria. After all his brother has done for him, even including all the times he has annoyed him with the puns, Papyrus felt that Sans deserved his own bit of happiness. His own chance to have the life he wants.
Or essentially five times of others witnessing Sans acting as a Father towards Frisk, the one time he admitted it.
-
Tags
Summary
开始于2018年12月30日，2025年8月10日正篇完结，手绘漫画，共829页，缓慢上传中。
“也许从我遇见你的那一刻开始，一切就注定再也无法回到原样了。”
sans，只是在snowdin一如既往地履行着哨兵的职责，却在ruins的入口附近偶然抓获了不知为何偷偷摸摸进入了undertale的ink！sans。在一番“友好交流”后，sans接受了ink的请求，前往他推荐的多元宇宙，并在那里遇到了一个会改变他一生的怪物——当然，对于那个怪物来说也是如此。 -
Tags
Summary
Asriel recently picked up a neat swear word from Sans to share with his mom.
- Language:
- English
- Words:
- 245
- Chapters:
- 1/1
- Comments:
- 1
- Hits:
- 10
-
The Save Ad by SargeWritesFanfiction
Fandoms: Undertale (Video Game), Deltarune (Video Game)
29 Oct 2025
Tags
Summary
The SAVE points used to hum with warmth and safety.
Now they whisper in commercials.[31 Days of Horror - Day 29: Media]
Series
- Part 66 of Undertale Fics
- Part 76 of One-Shots / Two-Shots
- Part 14 of Prompt Fics
- Language:
- English
- Words:
- 657
- Chapters:
- 1/1
- Hits:
- 28
-
The Cycle Always Repeats by yamisarts_2
Fandoms: Sonic the Hedgehog - All Media Types, Undertale (Video Game), Underverse - Fandom, Undertale AU - Fandom
29 Oct 2025
Tags
Summary
"The Heavens and Hell are splitting! The angels are falling! The demons are coming up from Purgatory! Run! Run!"
Chorus of screams. Beasts, humans, angels and demons now live together as one on a small planet called Gaia. Domed in cities by magical means.All Sonic wants to do is run. And a genie in a bottle, maybe.
Is it really something that's so hard to ask for?Series
- Part 1 of The Cycle Always Repeats
-
Intro Work, more coming soon! by CherryPondStreet
Fandoms: Deltarune (Video Game), Undertale (Video Game)
29 Oct 2025
Tags
Summary
Just a quickie intro for my other friends (wink wink, Spinel's song) on AO3!
- Language:
- English
- Words:
- 95
- Chapters:
- 1/1
- Hits:
- 5
-
Tags
Summary
You're an office worker living in Ebott, one of few humans who had decided to stay after the monsters emerged a year prior. When asked why on earth you didn't hightail it out of there, you'd say that you, for one, welcomed our new monster overlords.
But despite the jokes, deep down you were excited at the prospects of an entirely new and fantastical species, plain and simple.
One unlucky day as you're caught in the rain with only a bar to seek refuge in, you get introduced to the monsters within: one of which has definitely caught your eye
-
Tags
Summary
Kamari333's Kinktober shorts, following the prompts set along HERE.
Another year of Kamari333 doing their best to celebrate Kinkplay and the fun of erotica <3
Individual tags in the chapter summaries and notes.
Functional Table of Contents (with tags and warnings) included!
Series
- Part 9 of Kamari333 Kinktober Archive
-
Skeletons, roommates, yea no by UnderTrash
Fandoms: Undertale, Underfell - Fandom, Swapfell - Fandom, underswap, female reader - Fandom, SAN’s x reader, Papyrus x reader - Fandom, bullying - Fandom, Mutt from swapfell, undertale x reader - Fandom, Grillby’s, reader getting bullied, (y/n) - Fandom, Selfharm - Fandom, cheating - Fandom, Mutt x reader - Fandom, Underfell sans Red, Red x reader - Fandom, G sans - Fandom, G pap - Fandom, Mafiatail bros, roommates - Fandom, Fanfic - Fandom, anxious reader - Fandom, Mafiafell bros - Fandom, reader as mantle breakdowns, Killer sans - Fandom, Killer sans is a asshole, Killer x reader - Fandom, mental illness - Fandom, Non-Consent - Fandom, sexual harassment - Fandom, Romance - Fandom, Poly relationship - Fandom, Mafiafell sans - Fandom, Mafiafell Papyrus - Fandom, AsylumTale sans - Fandom, Lusttale sans - Fandom, Lusttale papyrus - Fandom, lustfell sans - Fandom, Lustfell papyrus - Fandom, friends to lovers - Fandom, Y/n just going through trauma, Chubby reader insert - Fandom
29 Oct 2025
Tags
Summary
You’re a bit of a nervous wreck type of girl, chew on ice as you hide into your room. Though no one could blame you, after all you lived with asshole skeletons that makes it their goal to push you around and bully you.
Why you may ask?
ALL BECAUSE A BITCH NAME LILIAN!
——-
They all hate you but if they gave you a chance they might like you…
(Heavily been Edited PLEASE RE-READ ) nov/13/2023 - feb/12/2024
-
Those Long Winter Nights by djspaceinvader
Fandoms: Deltarune (Video Game), Undertale (Video Game)
29 Oct 2025
Tags
Summary
What if Kris never got the chance to grow up with the Dreemurrs? No Asriel, no Asgore, no Toriel. And what if instead of Asriels old sweater, it was a fugly Christmas ensemble.
Following an accident in the recent past, Kris finds themselves, himself, growing up alongside Dess and Noelle for better and worse. How will things change, how will things stay the same?