Underborn

Reads 335
Votes 2
Parts 8
Time 2h 16m

Reads 335
Votes 2
Parts 8
Time 2h 16m

Mature

asgore asriel chara error fanfiction fangirl flowey frisk gaster grilby humanerror ink maturethemes mcd mettaton multiverse ocstory papyrus reborn sans toriel underfell underlust underswap undertale

What if Undertale suffered a major glitch? Like you were glitched into the game serious? What if you were able to change the hearts of the citizens of this now twisted world? Which will you choose... Fight or Spare?All Rights Reserved

asgore asriel chara error fanfiction fangirl flowey frisk gaster grilby humanerror ink maturethemes mcd mettaton multiverse ocstory papyrus reborn sans toriel underfell underlust underswap undertale

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8 parts

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The First Human [X Sans] {COMPLETE} by RaeTheStar

Imagine Undertale, but Chara never showed up. Chara wasn't the first human in the Underground. What if a glitch occurred, and you fell down instead? You fell into the Underground, but you cant remember your previous life. Now, you are surrounded by strange monsters, who have also never seen a human before. Will they let you live? [written 2017]

A Tree, For Us (Sans X Reader) by TheAbandonedQuiche

CONTAINS SPOILERS FROM BOTH PACIFIST AND GENOCIDE RUNS After a horrible situation, I (Y/N) scaped from home to avenge my (sibling). In a failed attempt, I got lost and fell through a hole, in there I found another world... "the underground". I meet many friendly monsters, one, specifically, changed my whole life. Both of us will try to give the monsters the liberty they deserve. And this is how all happened... (Cover made by me :3)

Becoming papyrus from underswap by KarmaAkabane425

What if someone became papyrus from underswap? What if they gave their brother more freedom? What if they were the one that error kidnapped instead of sans? (Things will be different including personalities because I never seem to get them completely ALSO the AGES will be DIFFERENT I'm having papyrus as the younger brother idc is sans is the younger brother or not, I'm having papyrus as the younger brother so no complaints And it's a different multiverse maybe everything will probably be different idk yet Also give me ideas if you want me to update this story faster.

Soulmates (US!Papyrus x Reader) [COMPLETED] by the_pacifist

My life was crumbling apart. My parents were killed. All hope was lost... Until he came. I was given the role as the protector of my universe by Ink, he gave me incredible power and turned my world upside down. I now have the heart of an angel and the strength of a warrior. A halo floats above my head and a sword rests upon my hip. My gift has been with me for ten glorious years. However, in the last few weeks, I've felt...different. I sense a calling in my soul, it's almost like a longing, a need. Should I answer it? Pronouns used in this story are she/her :) Disclaimer: None of the art used belongs to me! Also, Papyrus doesn't smoke in this story! #1 in underswapsans 7/10

Storyshifted - (SS!Chara X Reader) by 1m0nlyhumn

Hunted down, the only way to escape was up Mount Ebott. Y/N and Frisk, two extremely close friends, needed to continue running, they didn't want to go back. Not back there. The hunters were too close by now, but the two found themselves ready to jump down a large hole. They'd rather die than have to go back. So with one step back... they found themselves falling to their death. But... they didn't die. (Chara: 16F | Y/N: 17M | Frisk: 15F [Changed my mind Metta no longer exists in this universe 💀]) Story started on September 8th, 2024. (This story is inspired by A Shift of Events, made by Incurvat)

An Underswap AU: A Tale of Seven Book 1 by sabermoonlight1616

The Multiverse is vast, expanding continuously as more alternate dimensions are being created. Each world possesses it's own unique laws, stories and inhabitants. This world in particular, based on the well known Underswap Canon Universe, happens to revolve around three important questions. What if the first six humans who fell after Frisk never left the Ruins? What if the world is slowly succumbing to the corruption caused by the RESETs? And. . . What if Sans' cooking improved? A/N This is my own interpretation of Grouptale, in the Underswap Universe. Please read the Disclaimer and Warnings.

Reincarnated as Sans twin brother by Sansdoll123

The reader wakes up to a new life as a monster skeleton. In a new world, that's filled with monsters, humans, and magic. But instead of living their new life to the fullest, they will have to survive Gaster's experiments and war with humans. Just because Asgore became mad for absolute control over his citizens and the humans. Will the reader and his brothers find their freedom and a place to call home or die trying?

Reader insert. What if W.D Gaster didn't just get split between time and space, but actually ended up in your world in an abandoned hospital you called home? Your were a young child he decided to use as experiments to test human determination in said world and breaks physical laws to test human possibility? He knows of the powers you gained from his experiments... all but one, this one allows you to tear realities just enough to teleport into them. Knowing of Undertale you felt bad for the monsters stuck below in their world and wish to help them, but something goes wrong and you end up going to certain AUs and helping them, gaining the attention of some bad skeletons who now desire your power for them-selfish-selfs.

Anomalies ( Female Chara X Male Reader Sequel) [CANCELED] by Shyboxes

•Yeah this thing has been cancelled. Kinda sad for my first book to end up like this but I do intend on remaking this book one day with it's original lore. That ain't coming any time soon though. Anomilies these things are rare to happen but when the code is infected it can make these chances increase, after the last Timeline was Reset you forgot everything bringing you and Chara back to square one somethings have changed but someone especially hates you

"In this world, its kill or be killed" - Long ago, two races ruled over Earth: HUMANS and MONSTERS. One day, war broke out between the two races. After a long battle, the humans were victorious. They sealed the monsters underground with a magic spell. After the war, the monsters retreated into the deepest part of the Underground, which would be called, "Home." - Note: In chapter one i NICKNAME frisk "Sam" Due to the fact you dont figure out their name until the end of pacifist so i had to put a nickname to make it easier to write and read. Sam is a neutral name so it should be fine. - NOTE: All lines with this symbol " * " is going to be in Wing Ding font in the final release of the book. But for now, it is already deciphered for you! - *So yeah! This is book one of my Undertale Series, which will be 2 books in total. *The book is Fanmade of course, Support the original game by Toby Fox. *Since its Undertale, i have to warn you guys obviously that there will be action and mature things. And book one is Genocide, so... *Follow my Instagram: @Djcasso -

The First Human [X Sans] {COMPLETE}

Imagine Undertale, but Chara never showed up. Chara wasn't the first human in the Underground. What if a glitch occurred, and you fell down instead? You fell into the Underground, but you cant remember your previous life. Now, you are surrounded by strange monsters, who have also never seen a human before. Will they let you live? [written 2017]

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