1 - 20 of 64,395 Works in Undertale (Video Game)
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Summary
Killer leaves a cute and sexy present on Nightmare’s bed, opening himself up to a world of trouble in the process :)
Series
- Part 3 of Bad Sans Poly Drabbles
- Language:
- English
- Words:
- 3,254
- Chapters:
- 1/1
- Hits:
- 0
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Woventale - Shorts by Op7
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Alternate - Fandom
30 Jun 2026
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Summary
In Woventale, the Underground is a patchwork of strange cities and altered destinies, where familiar faces walk unfamiliar paths. Across the stitched landscapes of Snowfall, Sea Shore, Smokestack, and the Forest Ruins, lives intersect in quiet, calm, or sometimes dangerous, and unexpected ways.
This is the world woven by 'Watchers'. Like you. So why not stay awhile, and listen?
This - is not a grand story. This is a collection of short stories, moments, scenes and encounters.
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Summary
Killer convinces Cross to do some training in the dungeon.
Knowing Killer, Cross should've known that training wasn't going to happen.
- Language:
- English
- Words:
- 1,711
- Chapters:
- 1/1
- Hits:
- 0
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Coming Home to You by c00lsk3l3t0n95
Fandoms: Undertale (Video Game), Deltarune (Video Game)
01 Jul 2026
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Summary
Waking up in a brand new home, Tenna truly couldn’t ask for more. Well. Maybe just a teensy bit more. He just wants to be with his new Lightners. By Lightners, he means Lightner. By Lightner, he means Papyrus.
But, is there more to his new companion than meets the eye?
Series
- Part 3 of Papyrus
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Summary
nie wiem kurwa jak to pisze to czuję się jakbym był po jakiś ostrych narkotykach 👨🏼❤️💋👨🏿🤠
prosze nie brać z tej książki nic na serio 🙁
mogą tu występować jakbyś randomowi ludzie który w realu nawet nie są ze sobą powiązani 😮😳👨🏼❤️💋👨🏿
ogulnie to jakieś jebniete jets to publikowanie książek na ao3 💀🙁- Language:
- Polski
- Words:
- 3,144
- Chapters:
- 4/4
- Hits:
- 2
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Summary
What if instead of Mad Mew Mew
Ralsei was the secret boss..
Being controlled by Flowey?In this AU Ralsei starts losing control of his emotions and powers. Afraid of what to do he goes on a walk
And meets a friend.All he has to do is listen to this new friend and he can change their fates.
He needs this -
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Summary
Ink really, really, really hates being emotionless. It's rarely a problem for him, though.
Until it is.
Luckily for him, Nightmare can give him what he wants.
Unluckily for him, Nightmare has his own agenda in mind.
When Ink gets kidnapped by Nightmare, he doesn't expect much. Imprisonment, torture, maybe some interrogation?
He doesn't expect to join his enemy. -
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Summary
Sans experiences a corn maze the first time with Frisk.
Series
- Part 4 of Flufftober 2023
- Language:
- English
- Words:
- 213
- Chapters:
- 1/1
- Collections:
- 1
- Hits:
- 11
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Bound by night, Born of light by KeyLimeLizard
Fandoms: Undertale (Video Game), Undertale AU - Fandom
01 Jul 2026
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Summary
If you blacked out for a week or two after taking a projectile to the head, you'd probably be confused. Fair enough.
But come on—this? This is just excessive.
Waking up in the middle of an unfamiliar room, head pounding like it’s trying to cave in on itself, would rattle anyone. But it’s not just the room that’s unfamiliar.
Everything is.
No memories. No clues. Nothing.
Except… one thing.
your name.
Y/N. Y/N L/N.
And right now, that name is your only lifeline—something to cling to while you flounder through the wreckage of a life you no longer remember.
Now if only you could recall this elusive husband everyone supposedly insists you have....
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Summary
After escaping Nightmare and a tortuously long trial, Killer, Murder, and Horror were released into normal society with no job, connection, or people in this new world. It's okay; as long as they have each other, anything is surmountable, even shitty low-paying jobs or awful roommates.
As long as they have each other, everything will be okay.
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Summary
So, the general idea of this fanfic is that Chara never commits suicide and because of it they are still alive when the other humans come to the Underground.
They still hate humanity, but nevertheless aren't willing to commit suicide as they don't wish to leave their family behind, even if that selfishness means Monsters remain trapped in the Underground.
Then four years into their era the second of the eight humans arrives to the Underground, the one who arrived didn't trust Monsters and had in fact come to confirm whether the first human was dead, the fact that they weren't may be the only reason some peaceful resolution can be attained one day...unlikely, however.
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Summary
I HAVE RETURNEDDDD
I made something.
Do not eat it.
It is poisonous.
NO STAY BACK STOP YOU’LL GET SICKJokes aside please read this
After your father tricks you into meeting with the largest crime syndicate in the city, you’ve unintentionally bound yourself to them. Now trapped with a lot of morally questionable skeletons, you find yourself struggling to find a way out of this mess.
UPDATES ON THE 20th OF EACH MONTH
Title is currently a placeholder, if you have any suggestions just drop them in the comments!
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
30 Jun 2026
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Summary
It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-life crossover AU.
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Summary
A certain skeleton finds himself in an unfortunate loop, and attempts to get himself out. Will he succeed, or will he have to learn to live with it?
Series
- Part 4 of Papyrus
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A Life Not Lived by callingallcharacters
Fandoms: Undertale (Video Game), Undertale Yellow
30 Jun 2026
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Summary
It began with a refusal.
Clover didn't deserve to die. On some level, they all knew that. It didn't matter what came. Whether it be royal guards, other humans, or a certain flower, they would fight for the life they deserved to live.
Whatever the future may bring.Clover lives story because THEY DESERVED BETTER GODDAMMIT!
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Feeling Free after so Long by Gamerkat1
Fandoms: Deltarune (Video Game), Undertale Yellow (Master Sword Video Game)
30 Jun 2026
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Summary
Kris had decided. He would be a Knight. But he would do things his own way. He won't submit to anything and anyone ever again. Not to Carol. Not to the Roaring Knight. Not to Ralsei. Not to the jackasses in the Bunker. Especially the jackasses in the Bunker and Especially the Prohpecy that says he's a cage. The Prophecy can go fuck itself. And it felt... freeing. Despite the Soul in their body, they felt free. And free to save the world their way.
It helped that in their spite they forgotten what the Promise they made all those years even was.
Series
- Part 2 of What does it mean to Be FreeRune?
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Dark World Acadæmia by xXWolf_Boy_EMOXx
Fandoms: Deltarune (Video Game), Undertale (Video Game)
30 Jun 2026
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Summary
This fantfiction takes place in an alternate reality where the school in hometown is actually a school for magical abilitys, that only monsters have. Kris is (one) of the only human's here and stands out for their they cant do magic.. until one faceful day.
(And no its not hogwarts :¬. Fuck jk brownlings)- Language:
- English
- Words:
- 858
- Chapters:
- 1/1
- Hits:
- 13
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Summary
Cross hums, shifting his free hand to cover his sockets. "It's random," he says, "but where would you want to live if we ever get out of here?"
Killer blinks and uncurls himself so he's almost face-to-face with Cross. "Outertale," he answers with little hesitation, "so I can always watch the stars."
Or, Cross leaves.
Series
- Part 4 of Sans AUs
- Language:
- English
- Words:
- 1,426
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 20
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Isle de Hospitalito by MagicalWildCard
Fandoms: Deltarune (Video Game), Undertale (Video Game)
30 Jun 2026
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Summary
Kris & Susie decide to start their plans immediately, introducing Noelle around Castle Town and informing her about the truth of their more recent adventures. But through desperation from Rudy struggling in the Hospital, Noelle misinterprets a fact differently than most would assume, causing a Dark World to form within the Hospital while dragging all of her family in with her.
- Language:
- English
- Words:
- 1,578
- Chapters:
- 1/?
- Kudos:
- 2
- Hits:
- 51
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Summary
Writing Prompt: 'Do I not destroy my enemies when I make them my friends?' (Write a poem that explores this quote.)
Series
- Language:
- English
- Words:
- 104
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 12