Top 25 One-Shot Undertale Fanfics
Ranked by AO3 kudos. Mid-length Undertale fics — short stories under 10,000 words.
Alone Forever More
by 858FairyHats
A few days ago, if Susie had saw Kris and Noelle floating on the lake, face-down, she would’ve thought that they were just pulling a harmless prank, or it was just Kris being an absolute weirdo. But now? As she stands in the cold of the night, pounding on Toriel’s door, a haunting thought snakes aro
Seriously, HIM?
by squeakydink
Mettaton. In the Underground, he's a household name! I mean, you'd have to be living under a rock to not know who he is. I mean, no other monsters have even dared to try being a celebrity. Everyone loves Mettaton (even Mettaton himself is his own fan). So why on earth is Mettaton laying on his bed a
Real Boy Ramb
by sillyandquiteawkward
After accepting his fate to turn into a statue in the middle of the night, the night Kris finally visited TV World, Ramb suddenly and without any explanation, wakes up in the Light World the next morning, in a body he isn't used to, in a world he wasn't ever supposed to be a part of. It's his first
Underwater
by theboywithburninghands
After Kris’s suicide attempt, they realize that someone else close to them is in terrible danger. Or perhaps, is a danger to themselves…?
Ask Frisk And Company
by AskFriskAndCompany (Daisy_Serra_Siffrin)
The long running Undertale askblog by TrashQueen/MegaFattyEX (https://askfriskandcompany.tumblr.com), now in ao3 form!
How to Prevent the Roaring and Other Fun Group Chat Names.
by Archivist6
Chat fic exploring the lives of Kris and the residence of Hometown through their cellphones as they try to break the prophey once and for all.Featuring the Roaring Group Chat, the FUN gang, the Dreemurr Family (including togore), and the newly formed polycule as they barrell down the road towards fa
Borrowing Time from Tomorrow (Undertale Reverse Harem x Reader)
by Anonymous
Papyrus thinks he’s being kind. He thinks that by ending your brief, beautiful "situationship," he’s sparing you from the wreckage of his own guarded soul and the threat of Chara's power. He’s trying to prevent a loss that hasn't happened yet.Now, with three other timelines crashing into theirs, the
Moss
by Buttercup_ghost
You are an expert in playing victim. (Deltarune's Angel, A Heart On A Chain, A Soul In A Cage. And Kris Dreemurr: Puppet.)
Cracked Bones and Broken Souls
by Nyxofthenight16
You managed to escape being trapped underground after running into the forest when your parents died in the war. You were up on the surface from birth up until you were the human equivalent of 18. On your 1800th birthday, you escaped your abusive foster home to join the rest of your kind below Mt. E
Not so bad
by HelloThere3306
Kris and Sans reach an understanding... through bribery.
save your tears
by freshiewrites
You live a somewhat busy, somewhat plain life, trying to work your way up in the culinary world to become a well known chef in your own right. Somehow you've gotten thrown into the weird world of these skeleton men that all... seem to have an interest in you.
Meet the New Me
by WillowSparrow
After living in the Underfell universe for all your life, you're suddenly thrown into a mansion with several other skeletons who all seem to know you.Or, well, a different version of you.And many of them seem to be dating Lydia--a girl whom seems to ruin everything she touches.But these skeletons se
The Pros and Cons to being a Villainess
by WillowSparrow
Your best friend Sophia has been going on and on about this stupid romance game featuring skeletons and yanderes. You thought it was stupid. Well, until you were literally transported into it, but not as the protagonist. As the villainess.
Black Christmas
by RickyTastic132
“December wasn’t really the greatest person” A character analysis of Dess Holiday, and the story from her perspective. Follow the Roaring Knight’s perspective from the events before, after and during chapter 1 - 5 You know things about her, but you don’t know HER Find out who she is, what she is to
Sundering Shadows
by Anonymous
There was a muffled shout. Something thrown. Her parents were fighting again, not for the first time that night or what would be the last.[A tale in which Frisk discovers what lurks in the darkness. And what it takes to break free from it.]
Obvious & Oblivious
by ThatRand0mFand0m
Mettaton, a renowned robotic entertainer who works evenings at a nightclub, is no stranger to the art of flirting. It was part of his job, to charm, to cheer. But when an old friend begins to stop in at the nightclub, things get interesting when she brings a friend. One who immediately caught Mettat
Caperucita roja
by Tylerci
Frisk solo quería ver a su banda favorita, nadie nunca le advirtió que el mundo está lleno de bestias peligrosas. Fell era una de esas bestias y en ella encontró algo que perdió hace mucho, por supuesto que debía poseerla. Cómo un lobo que caza a su Caperucita.
Open Mind, Open Heart
by Fandere0
Telling Sans that he's gay might have been the worst mistake that Papyrus ever made, because oh, the jokes! They kept coming and coming out! ...Was that a joke, too?! Featuring an ace Sans, gay Papyrus, over the top outfits, and Mettaton attempting to flirt with someone far too drunk to understand p
Nobody But Me is Gonna Change My Story
by Margaret_Penningsly
"When the monsters first appeared at Mount Ebott in early 2023 the internet blew up with theories. Some thought this was a sign of the end of the world, others joked about how many life-altering events Gen Z among others will have lived through, still others refused to believe that monsters were rea
Fan Meet and Greet! - Papyton
by Fanfic_Sweatshop
Papyrus finally got tickets to meet his idol, Mettaton! Let’s hope he doesn’t embarrass himself in front of his hero…
Must Be Dreaming
by pessimistic_frog
Roman is your average college student. Overworked and underfucked. Too little sleep and too much caffeine. However, she starts to find that her serious lack of sleep is leading to some crazy dreams. Dreams in which she's now a skeleton, with three alternates, and a buncha other skeletons that seem h
'Wait in the Car,'
by skunkwithglasses
You have a really abhorrent and drunk friend who loves travel, being the stupid pleaser you are, you go along with her plan to drive to California. After nearly crashing several times, and complaining about her backseat driving, you arrived at Santa Monica, the salty air hitting your face with a tin
Dinner Parties and Pep Talks
by celestial_waters
Papyrus decides it’s time that he cooked his own Italian spread. Can he challenge Olive Garden? That remains to be seen. Anyway, Sans takes this opportunity to see if he can invite Frisk over and catch up. The girl’s grown on him after all. Expect to see the ships I listed and wholesome sitcom-like
Papyly 2026
by Sin_Cognito
All my prompts for Papyly 2026! Will contain Papcest as well as /Reader content, a lot of AU Papyri, fluff and smut and platonic. All the chapters are predicted to be one-shots, but who knows what can happen? :3
Determination: Or in which Chara, Frisk, and Asriel Try To Run A Government.
by Friskriel15
So, you succeeded. You, Chara, and Asriel ended the Undertale, and all is well and good. The monsters are free, and they even have a kingdom on the surface. There's just one tiny problem. You know those mages that sealed the monsters under Ebott? Yeah, they're still around-or at least, their descend
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About This List
This list of 25one-shot Undertale fanfics spans 107,814 total words. Kudos range from 5 on the newest entries to 160 on the most established. Most entries are ongoing works, so subscribe on AO3 for update notifications. The most common rating is Teen And Up Audiences (9 of 25 fics).
Recurring tags across this list: Fluff · Female Frisk (Undertale) · Post-Undertale Pacifist Route - "I want to stay with you.".
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