1 - 20 of 62,450 Works in Undertale (Video Game)
Navigation
Listing Works
-
Apparently His Definition of Freedom Now Includes Falling in Love with the Criminal Who Destroyed a Slave Auction by Nabelle
Fandoms: Undertale (Video Game)
14 Mar 2026
Tags
Summary
Sans learned this lesson the hard way.
Don’t hope—because hope only leads to disappointment.
Don’t dream—because dreams eventually turn into nightmares.
And most importantly, don’t fall in love if you’re the one who ends up broken in the end.How many times had it happened in the past two years?
Fifth? Sixth?Sans had long since stopped bothering to count.
Any hope of escaping the magic-blocking collar around his neck and the cuffs on his wrists had long since faded. It was easier to accept it and wait for the next owner.
Heh. Hopefully, this time it would be someone with a savior complex. At least then, Sans might be able to breathe a little easier.
What he didn’t expect, however, was that this time a new owner wouldn’t be waiting for him.
Instead, a tank crashed straight through the slavery auction hall.
- Language:
- English
- Words:
- 1,795
- Chapters:
- 1/?
- Hits:
- 0
-
Tags
Summary
Dream wakes up late in his bed. His head is pounding; every limb, every part of his body aches; he's exhausted, and has a nasty cough.
Luckily, Cross is there to save the day!Ink runs out of their vials, and Error--begrudingly concerned for their wellbeing--helps them back on their feet.
---
Two oneshots kinda based on how I'm probably getting sick lmao💔
- Language:
- English
- Words:
- 1,168
- Chapters:
- 2/2
- Hits:
- 2
-
Tags
Summary
Frisk, a holy angel, always hated the perverted, annoying as hell succubus, Chara. but he has a huge, blatantly obvious teenage crush on her, but he doesn't know. Chara, on the other hand, despite being his 'enemy', holds no grudge against Frisk, and unbeknownst to him, she has a massive crush on him she's aware of.
Frisk's best friend and father figure, fellow angel Sans, and Sans younger brother, fellow angel Papyrus, know what's going on. and they come up with an idea to get them to bond: they, alongside Chara's adopted younger brother, an angel named Asriel make a deal with a dealmaker named Ace, so Frisk and Chara are now stuck in a very huge dungeon, and have to rely on each other to escape. along the way, Frisk starts to realize his crush on Chara. will it work out in the end? get ready to find out, because they're in for a ride...Series
- Part 2 of My Undertale AU Stuff
-
Tags
Summary
make no mistake, that's what he heard. Frisk had fallen down into a hostile world, what appeared to be out to get him. then there was a human, one who hated her species with a burning passion. but will an encounter of the two change that? and what else will happen with Frisk's adventures?
[Frisk is 16 and Chara is 19]
Series
- Part 1 of My Undertale AU Stuff
-
Golden Heart under Blue Wings by Thonny_08
Fandoms: Undertale Yellow (Master Sword Video Game)
14 Mar 2026
Tags
Summary
After several identical Runs, something different happens in the confrontation between Clover and Flowey on the Neutral Route....
-
Tags
Summary
Boy does Taylor have one heck of a 'What I did this summer!' story from Mt. Ebott Nature Camp.
But that is in the past. Now Taylor gets to introduce all her new friends to Brockton Bay.
I am sure this is going to go over swimmingly. Nobody could have a bad time. Surely.
-
Where Realities Breaks by PhantomFaces90
Fandoms: Undertale (Video Game), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Aragami (Video Game), The Music Freaks (Web Series), Multi-Fandom, Original Work, ARK: Survival Evolved
14 Mar 2026
Tags
Summary
Across four different worlds, four lives are interrupted at the worst possible moment.
A broken musician.
A tired judge of timelines.
A reckless hero-in-training.
A silent warrior of shadows.Without warning, they are torn from their realities and thrown into a strange mechanical dimension that shouldn’t exist.
The problem?
The world that dragged them here never meant to take them at all.
Now hunted by rogue machines and surrounded by unstable portals, Jake, Sans, Denki, and Aragami must survive a place that sees them as intruders.
But before they can escape…
They’ll have to survive each other.
(Reminder that these characters are from my own Au’s and they will be shown eventually, you have been warned)
(Was previously named “Dimensional Highjinx”)
-
Tags
Summary
Dust has never had an easy life. But when Papyrus, the one thing that was good in his life, died things only ever seemed to get worse. After his mother decided to move away from the house that only brought bad memories, Dust has to get used to a new school. He quickly finds himself drowning under the pressure of bullies and his home life but maybe…amidst this suffocating sea, he can find friends to help him through this.
- Language:
- English
- Words:
- 4,301
- Chapters:
- 2/?
- Hits:
- 2
-
Reincarnated as Error Sans (SANSES X READER) by l0nesomly
Fandoms: Undertale (Video Game)
14 Mar 2026
Tags
Summary
After dying, you found yourself trapped in a white, endless void. You thought this was your afterlife: a tragic representation of how you felt trapped all your life; however, you noticed how your hands were... boney...? What the hell is happening?
ERROR(READER) X SANSES
DISCLAIMER:
- MATURE CONTENT & VIOLENCE (Death, Killing, Violent language) -
Tags
Summary
A mutation has spread across the globe when monsters were released, humans either dying as their bodies couldn’t handle it or mutated with the rest. Some go as far as killing themselves as they couldn’t live with the fact they are not human, they are Monsters. Just like the ones from underground. But all aren't mutations or monsters, some are still human.
The mutation was simple really, a change of dynamics. Humans started taking more unusual forms, growing more than a few ears, eyes, arms, legs, shit even a head at one point. Or body morphing differently altogether. Turning into their worst nightmares. As for the mutation doesn’t only affect the genes it also changes your SOUL. Your SOUL reflects your innermost desires, therefore once it's mutated you change into what you want most.
Mc changed, being adopted, being abandoned and now with a new family she starts to discover life as an adult.
BOOK TWO OF LITTLE POOR OLE ME. (recommend reading the first one)
Series
- Part 2 of Little Poor ole me
-
Tags
Summary
"are ya good at keeping secrets?"
After an accidental adventure into the underground, you've found yourself shoved into the role of "Ambassador of the Monster People." Now, it's not exactly that you didn't want to help your new friends with integrating to life of the surface; you were honored! But, you were less than prepared to represent an entire race of intelligent life.
Luckily, your new friends are pretty proactive in helping you out in the role. Sans in particular seems surprisingly engaged, for someone who identifies himself as "lazy."
He's confusing. The more time you spend together, the more you learn about him-and the more confusing he gets.You should also get more sleep. You're seeing things.
---
Basically, the reader tries to balance their job and dealing with past traumas of the Underground from those around them, including a certain shiftless skeleton. -
Die Autorin im Multiversum (Undertale AU) by SM_Bookwriter
Fandoms: Undertale (Video Game)
14 Mar 2026
Tags
Summary
Eine Autorin die in die Welt von Undertale gezogen wird.
Es wird viel Trauma und Herausforderungen geben die die Autorin meistern muss um ihre Geschichte einen Happy End zu verschaffen.
Jedoch gibt es eine Macht die sie mit allem was sie hat, aufhalten möchte. Die Macht, die ihr das Betreten des Multiversum überhaupt möglich gemacht hat.
Doch ist gar nichts so sein wie es zunächst scheint. Die Autorin muss zudem herausfinden wem sie trauen kann und vor wem sie sich fernhalten sollte.
Wird sie es schaffen ihre Ziele zu erreichen um das perfekte Ende für alle zu erschaffen oder wird sie unter der großen Last scheitern, wodurch die Geschichte nicht mehr weitergehen wird.Finden es heraus :).
Geschichte ist in Wattpad schon fertig veröffentlicht. (Unter S.M_Bookwriter ; Die Autorin im Multiversum (Undertale-au) )
- Language:
- Deutsch
- Words:
- 147,497
- Chapters:
- 25/49
- Hits:
- 12
-
Tags
Summary
A mutation has spread across the globe when monsters were released, humans either dying as their bodies couldn’t handle it or mutated with the rest.
The mutation was simple really, a change of dynamics. Humans started taking more unusual forms, growing more than a few ears, eyes, arms, legs, shit even a head at one point. Or body morphing differently altogether. Turning into their worst nightmares.
Y/N being a young child at the time of the outbreak changed with the rest of her family, half of her family died or killed themselves resulting in her being an Orphan at a young age, left alone in the world as her body shifted and changed. Body becomes leaner, smaller…cute. Cat-like ears and tail sprouting from her body, legs breaking and reforming into back hind legs of a cat's, fur covering her legs stopping at her waist.
Not only that, but she is an Omega.
Of course she doesn’t know oh no no no blissfully unaware, well that is until an over caring human Frisk decides to visit the Orphanage dragging along her friend Chara. Whom in turn absolutely dreads the visit. Let's say…frisk was the door to meeting a rowdy group of skeletons…
THIS WORK IS COMPLETE!
Series
- Part 1 of Little Poor ole me
-
Tags
Summary
Naturally, after planning to surprise your boyfriend by secretly taking a week off, you get turned into a cat. What follows is a terrible experience of being mistaken as a 'fur-baby' and all that comes with it.
Series
- Part 3 of Turned Into An Animal (Sentence Prompts)
-
Tags
Series
-
The Doctor's Descent by Feanyx1
Fandoms: Undertale (Video Game), Doctor Who (2005), Deltarune (Video Game), Doctor Who
14 Mar 2026
Tags
Summary
He thought that the radiation would kill him. He thought that his time as the Doctor would come to a sad and brutal end. He was wrong. And that was so much worse.
In his efforts to find himself, and without his companions, he accidentally stumbles onto a monstrous civilization miles below the Earth. With his newfound DETERMINATION and some new allies, he'll come to realize what it truly means to be a friend, and learn how to live his last lives with his head held high.
And make sure that, just this once, everybody lives.
OR
Undertale but the Tenth Doctor replaces Frisk. Fluff, angst, AUs, and timeline shenanigans ensue.
*No knowledge of Undertale or Doctor Who is required, though it is helpful if you've experienced at least one of them.
-
Tags
Summary
Ya no sé que es lo que quieres de mi.
No sé si me necesitas vivo o muerto.
No sé nada ya.
Solo que estoy a tu lado después de todo.
Creo que eso es para lo que fui creado.
Soportarte y amarte hasta el final de mis días.
----- X -----
Es la primera vez que publico en AO3 jjj Este es un trabajo propio que está en Wattpad y que hice en pandemia, solo que terminé de reescribirlo hace un par de años jsjs:D
-
Make Your Choice by PinkPlasticPrincess
Fandoms: Undertale (Video Game), Mafiaswap - Fandom
14 Mar 2026
Tags
Summary
Choices mean everything in the zombie apocalypse. Being the leader of a surviving colony of humans and monsters, Carbine has to choose carefully to ensure the best outcome for the people already in his care and those closest to him, even at the expense of a small minority of other people. So why is one disabled human woman making him question himself?
-
Tags
Summary
Nothing is such an interesting thing to experience.
This is because as you are experiencing nothing, you are, in fact, experiencing something.
And that something is Nothing.
But you don’t know that, after all, how could you?
Nothing is all you’ve ever known.
And so, when you start experiencing Something, the transition is, odd, to say the least.
But you don’t know that, do you?OR:
I made a au(???) cuz i was bored. LETS SEE HOW THIS GOES.
OR x2:
ever wondered where the little failed sketches, the color testing, the deleted words go when you'r done with you're au? Welcome to SketchSpace.
-
Bound by Shadows by LinkDremmurr
Fandoms: InuYasha - A Feudal Fairy Tale, The Legend of Zelda & Related Fandoms, Ancient Greek Religion & Lore, Fruits Basket (Anime 2019), Marvel, Batman - All Media Types, Hunger Games Series - All Media Types, Alien Stage (Web Series), The Inheritance Games - Jennifer Lynn Barnes, DCU, Sonic the Hedgehog - All Media Types, Undertale (Video Game), 呪術廻戦 | Jujutsu Kaisen (Anime & Manga), Cookie Run (Video Game)
13 Mar 2026
Tags
Summary
In a world filled with temporary peace, Celestials are prospering under a righteous king, in a little town nineteen-year old celestial Persephone is searching for plants to make a medicine for her brother's sickness... the problem is she might have gone somewhere she shouldn't... Will this new journey bring physical and emotional pain? new friendships? or could it be Love??
Series
- Part 1 of Sunshine and Shadows
