Undertale
47 stories
So Many Universes, So Many Possibilities by PinkHorsePro
PinkHorsePro
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After falling into the void, Error lands in a different multiverse. He saves two little babybones from the clutches of Gaster, and meets the protector of this multiverse. But, it doesn't go well. He freaks out and throws himself into the void once again, the children following behind him. It is then Destiney realizes that the multiverse was too similiar, with too many familiar abusers. But where could she send him? A minigod talks to her about multiverses in need of rescuing. She agrees to help her out, sending Error to them, the inhabitants all becoming very protective of Error. Error's old universe, after learning that they needed him but not why, travel to the universe he was in at the time to capture him. But, with how many friends he has made, they might want to reconsider their decision. For Error was hurt just as a lot of them was, and they will protect him with everything they have. I'm not sure if this description was that good, I suck at descriptions. This is based off Harris6's Falling Into A Different Destiny and their concept of Forced Destroyer. Please, if you haven't seen any of their books do go check them out. It is definitely worth it. I do not own anything except for the OC's I include and if I add a certain world to this. Undertale belongs to Toby Fox. Please be aware that this book will get dark and have many trigger warnings. The art does not belong to me, it belongs to it's original creator
Sans/Papyrus's x male reader One-shots  by Feralghoul117
Feralghoul117
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A sprawling collection of Sans x Male Reader and Papyrus x Male Reader one-shots, each exploring different universes, scenarios, and emotions. From lighthearted dates filled with laughter and teasing, to dark, intense encounters in twisted timelines, these stories dive deep into the bonds between you and the beloved skeleton brothers. Whether it's classic Undertale, an AU like Underfell or Swapfell, or even modern-day alternate worlds, each chapter brings a fresh take - romance, angst, action, or even a bit of smut, depending on where the story leads. No two stories are alike, but they all share one thing: you at the heart of it all, finding love and connection with Sans, Papyrus, or even both in unexpected ways. Perfect for fans of slow burns, wild adventures, and multiverse chaos, this anthology will make you laugh, cry, and maybe even blush. 💀✨ Your story. Your choices. Your skeletons.
LeviathanTale: Song of the Abyss by CatOppp
CatOppp
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These four walls are the only sight he's ever known. There is nowhere to escape the prying eyes that watch his every move day after day. Surly, there has to be something better beyond this gilded cage? Started 2/25/25 Finished
Waking Destruction by PandoraMoonier
PandoraMoonier
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Operation Pandora was a mission made by the major deitys of the multiverse in order to punish their chosen children and restore the balances. Operation Pandora was started with a being created from a mix of every deitys magic using DESTINY's as a base. that being is one called Error. Error is the godess of destruction and possess power far beyond what the normal chosen children do but due to the fact she just woke up... let's just say she isn't the best at starting off at her godess duties. 💛 Heavily Inspired by 'Awoken' its a great story so I recommended you go read it if you haven't. No pictures used in this are mine unless stated otherwise. the main ship in this is Errormare / Nighterror, don't like it then don't read.
"reflection" FGOD error by iceyprincessa
iceyprincessa
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(A completed story) (UNDER EDITING TO FIX MISTAKES) What would happen if Error meets his other self? Another forced god of destruction? But theirs a difference. Error's ink doesn't know about the balance. But the other does? But doesn't care!?! How will error help this error with out getting exposed? But what happens if his ink finds out about the balance and the others wants to find him? What if his FATE wants him back to turn him back into her toy once again? What will error do? How will his new friends and old friends and old enemies help? Read to find out! (this is adopted so I recommend to read the original author its really good)
It hurts.. | an insomnia (dream X Error) story by Lamarlucid
Lamarlucid
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'Dream' the guardian of hopes and dreams has finally given up, so he tries to erase his existence by jumping in the void.. But when he got there, he saw someone else going to jump and it was... "E-Error" §××××××××××§ Warning: Bad grammar Self harm Suicide Strong language Blood Angst +13 If you're uncomfotable with any of these feel free to click off...
New Beginnings (F!God Error) by Donut2460
Donut2460
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{Short, completed story} Error, hated by Fate from the start, had enough. In a battle with Ink, he lost for the first time and was tied up. Ink, confused why Error destroyed Au's asked why he did so, threatening him with death. But Error scoffed and refused to answer as Ink, naive as he was would never understand and was killed without struggling, embracing death with open arms. That's when he woke up to something strange and met a mysterious person who had saved him and said that she'd give him a better life, another chance. Can't explain anymore, or else I'll just spoil everything. Anyways, enjoy! (Art is not mine unless stated so, and Fgod au concept belongs to Harrish6).
Being a Diamond by Nanachi8
Nanachi8
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Error was just enjoying a day out with himself. Nobody bugging him or fighting for the rights of the universe. And he did not even need to do anything as he was content with his destruction left in his wake from trying to save the multiverse. But, sadly, our glitchy skeleton was about to experience an adventure as he got to experience another universe. But he really does not know what to do with the attention. (I got this idea from somewhere but I could not remember where! It might be from someone I'm following though.)
A Jaded Emerald [NOT LOOKING FOR ART COMMISSION] by KTama20
KTama20
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Abandoned on Mt. Ebott at the tender age of five, young Harry's unsurprisingly died, but Death's always had a weird relationship with his variant... Meanwhile, before Flowey's revival as souless talking flower, Sans makes a discovery under the mound of snow, Papyrus has always wanted to be a big brother anyways. *Edited Summary (29/09/2025)
There LOVE for me (male sans reader x chara and frisk) by Genos_sans
Genos_sans
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Y/N has been fighting chara for so long he doesnt gene know why he's trying. Until she gives up saying she can't keep doing this to him. Is this another one of her tricks? I do not own undertale or any other version of it or any vidoes or pictures I may use unless I say I own it.