1 - 20 of 61,028 Works in Undertale (Video Game)
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You are suuuper obsessed with Galaxy and its thing, especially the universe! You spend over Years building a machine and another over years to make it perfect, night and day, even when you're sick, you still do the things you love.
You close your eyes and ears to the people who call you crazy, calling you mad, insulting your creation, Etc. Etc.
But who are they to stop you anyway??And dear god, after years of tears, blood, and mind... the MACHINE IS PERFECT! At least that was what you thought.
You get sucked by your own creation when you try to make coordination and testing on it, and now you're here.. with a skeleton.. oh my god
It's wonderful! YOUR MACHINE IS WORKING! HAH! You can't wait to slap the mouth that calls your creation useless by this INVENTION~
Well, after you successfully back to your own universe, survive on this world, well, you're gonna get help from the skeletons infront of you... right?
And then you can ask a few questions about this universe, hopefully he wants to answer them... he will... You're going to make sure he gonna help you, if it means begging.
Alright... here we go.
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A retelling of how the Bad Sans, under Nightmare, came to be. A different tale and way of how they gathered, bonded, and began to work together.
Join Nightmare as he fights his past and determines who he is as a person on his own after meeting one, unexpectedly dangerous, individual that changed his perspective and shifts how he determines to live his...no, their life from then on.
- Language:
- English
- Words:
- 834
- Chapters:
- 1/1
- Hits:
- 3
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Cock of the Onceler by Sexy_Baboon
Fandoms: The Lorax (2012), Gravity Falls, Undertale (Video Game), Don't Hug Me I'm Scared (Webseries), Donkey Kong Country, Sonic the Hedgehog - All Media Types
10 Dec 2025
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can you believe in the onceler
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Life in the Underground by Vampirtulpe
Fandoms: Deltarune (Video Game), Undertale (Video Game)
09 Dec 2025
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After decades of being separated, Spamton had made it into the Underground and reunited with his husband. With their future regained, all that was left to do was catch up on lost time and enjoy the rest of their lives together. It wouldn't always be easy, but it'll be worth it.
This is where all the one-shot ideas I have for this AU are going to be posted!
Series
- Part 2 of Trustfall AU
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Underune by Angel_Crafter, Lord_Obvious_Of_Duh
Fandoms: Undertale (Video Game), Deltarune (Video Game)
10 Dec 2025
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When Deltarune characters and Undertale characters meet together.
This is literally my third attempt.
Somewhat inspired by Deltatraveler.
All characters belong to Toby Fox
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They say life is full of surprises, but [Name] never expected to end up in an entirely different universe, one filled with monsters, souls, and magic. But this isn’t some happy fairytale; it’s reality. And reality bites.
Adapting to this strange new universe feels impossible, especially when the skeletal monsters causing you trouble also happen to be your roommates. And 'passive-aggressive' doesn’t even begin to cover it. Still, no matter how lost or out of place you feel, you refuse to let go of hope.
After all, if life can surprise you once... who’s to say it won’t surprise you again?
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What happens when the one who carries everyone's hopes and dreams loses their ability to do so? Dim, driving force behind the resistance, disappears.
When they're found, it's as a bitty, and by the very skeletons they've been fighting.
They're kept alive. And that, is perhaps the most concerning.
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★ ☆ My Ordinary Life ☆ ★ by Solo1234 for Camila Varela
Fandoms: Original Work, The Amazing Digital Circus (Web Series), Hazbin Hotel (Cartoon), Deadpool - All Media Types, Marvel, Undertale (Video Game)
10 Dec 2025
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Another day, another P.E class with a substitute. It was alright, Camila conversed and laughed with her friends and fellow classmates. Soon enough, the period ended and she was off to business management with her grouch of a teacher. But what was this? Camila was handed a card. This was no surprise as it was her birthday, her 16th one in fact. She decided to open the card.
:]- Language:
- English
- Words:
- 3
- Chapters:
- 1/1
- Hits:
- 16
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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?
Series
- Part 1 of My Undertale AU Stuff
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A controller's dismissal by Sirsonan
Fandoms: Undertale Yellow (Master Sword Video Game)
09 Dec 2025
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Flowey wasn't going to RESET Clover this time. Even he has his limits before his patience runs thin. Although time RESETs anyways. Flowey figures out who used HIS powers and scares them into leaving. This run faces the consequences of that action.
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- Part 8 of Underverse Oneshots
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Dessrielcember baby! by Wackywoohoopizzaman_5
Fandoms: Deltarune (Video Game), Undertale (Video Game)
09 Dec 2025
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A collection of works based on HeyoNavi's and others prompts for dessrielcember!
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Long ago on the surface as the light of the sun gave protection. Humans and monsters live in peace and humility side by side, as days pass and the small village starts to advance. A sickness struck, humans baffled by this as they struggled to find a reason why as the ill became fatalities. The odd part as none of the monsters became sick, anger on one side bled into the other when an irredeemable action was made and war started. irreversible damage on both sides as it escalated. The Queen of Monsters as a last resort tried to plead mercy with humans of the village. After the case was solved, they agreed with the monsters being sealed down.
Tragedy struck monsterkind, the King of Monster declared war on humankind with the goal of getting 7 human souls. With the disappearances, humans fought back and with the amount of lives lost, the ones with the strongest [DETERMINATION] able to be contained.
Years later the war was forgotten as civilization advanced. The missing cases caused in MT. Ebott made them put up warning signs warning anyone from venturing into it as a way of preventing.- Language:
- English
- Words:
- 4,279
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 18
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Cream Book book of Cream by Pie_code
Fandoms: sans ensemble - Fandom, Undertale (Video Game)
09 Dec 2025
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Summary
I like Cream. A lot. So I will put all the writing I have of them here!
Chapter 1: Dream Angst
Chapter 2: Cross Angst
Chapter 3: Cream Fluff -
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Summary
A Post-JUSTICE Clover tries the Pacifist Route.
A Post-JUSTICE Martlet is suffering memory corruption from the old timeline.Series
- Part 2 of Partners
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Five months after their first meeting, Tenna finally comes clean. To his surprise, it seems Mettaton has something to admit to him as well.
Series
- Part 6 of Ghoul's Mettatenna Collection
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Undertale through the eyes of the soul of throwing hands—
ahem, Bravery.This is the story of Kaith: magical kid Mike Tyson, professional person-puncher, and part-time emotional disaster.
He’s small, he’s scrappy, and he’s swinging harder than life ever planned.Expect trauma, fists, magical nonsense, and emotional-support tomato farmers.
Someone save this boy. Please.- Language:
- English
- Words:
- 1,552
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 9
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Fortunately or unfortunately, you had somehow manged to bag the infamous au destroyer and while he wasn't stable by any definition of the word, he cared about your needs.
He isn't quite ready to move your relationship to the physical stage yet but...
Souls aren't really physical, are they?
- Language:
- English
- Words:
- 1,346
- Chapters:
- 1/1
- Kudos:
- 10
- Hits:
- 46
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Summary
This fic is about the fight between Ink and Dream and on how I think they will solve it. Not everything in this story is canon.
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Someone powerful is tired of the bad endings. Time to take fate into their own hands.