What if Sans only got Papyrus away from Gaster? What would happen if Alphys found him trapped years later? Can they teach him to be a normal monster, or will he forever remain a weapon?

(Underfell AU) Sans, badly beaten by his brother, goes to his friend from the ruins for help. But with his injuries and his dissaperaence from Snowdin, what is to come on both sides of the door?

Having escaped their cruel imprisonment within Mount Ebott, monsters have settled on the surface for six years now. Their human savior, Frisk, now struggles with the busy life of being an ambassador. Soon, tragedy strikes, and with a civil war brewing back home and every timeline now at stake, will the prophesied angel manage to keep their happy ending? Undertale's world and characters are owned by Toby Fox. This is a non-profit fan novel. Please support the original game.

Ever since the barrier was broken and monsters rose to the surface once more, it seemed like despite the odd reception that they received from the Humans of Ebott, everything was starting to take a turn for the better. But almost a year later, the others couldn't help but notice something different...specifically...SANS was different. The usual laid-back, wise-cracking skeleton was acting...strange. His smile was forced, he didn't tell jokes, he's deprived of sleep, and the demons that were thought to have been put to bed ages ago keep rising back to the surface to torment him. It was no secret anymore. Something was wrong...VERY wrong...but what? (Current Chapter Status: Chapter 46 Pending) Cover art by- @CarrieTheEnder Ranked #280 in Fanfiction 12/19/17 Come join the Cage Of Bones Discord group!- https://discord.gg/R4Q92Nnn

Have you ever wondered what happened before the Seventh human fell. Before YOU...came to the Underground? The person that manipulated time and space, who played with the lives of many. Who said you were in the one in control? ┅ Published on: 10 Oct 2018 Completed On: - Cover art: By me

All was peaceful in the Underground... That is, until a horrible disease began spreading rapidly amongst all monsters. It started in Hotland... Then spread to Waterfall... Finally, it has reached Snowdin. Sans never goes outside anymore. He doesn't even go to Grillby's, out of fear the disease will infect him and he won't be able to protect his brother in these dangerous times. All hell has broken loose... And it lurks just beyond the Skelebros' locked doors. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ WARNING: This fanfic contains horribly painful transformations, cursing, character suffering, gore and other content of that sort. Do not read if you are uncomfortable with any of said themes. Highest Rankings: #41 in disease #359 in papyrus #75 in undertaleau

Papyrus is dead. As are over 100 of the monsters in the Underground. Now it was just Chara against Sans in the Last Corridor. Already prepared to die here, Sans fights more out of responsibility than anything else. Simply waiting to die, and that would be the end. At least until next round, right? Unfortunately, Chara has other plans. !!Warning: language is a thing in here **This is MY story from Archive of our Own. I'm copying in here for more people to enjoy**

Reset after reset, all Sans wanted was to kill the human to protect his friends and family. With a new arrival in the underground Sans had a very important choice to make. Kill the human without knowing their intentions or spare them and see if their promise of saving the monsters was true?

Just one month has passed since the death of one beloved individual, and less than a day has passed since the death of another. Unbeknownst to those who were a part of these young Monsters' lives in a previous time, the passing of these two wounded souls may have a far bigger impact than anyone could have imagined. And now, as five different Monsters find their stories intertwining into one, we again shall ask ourselves the question powerful enough to destroy the minds of many: Who is truly at fault? Cover art drawn by @fnaflovergirl. PLEASE NOTE: This book is the third and final in its series. It contains major spoilers to the first and second books, as well as this book may not make much sense without having read them first. So, if you want to keep the excitement of the first two books without any major spoilers, I HIGHLY suggest going and reading those first. They are titled Your Fault and My Fault. DISCLAIMER: UNDERTALE is owned by Toby Fox. UNDERFELL belongs to the AU Community. COVER IMAGE edited by me. I do not own the original image. The original cover image has been drawn by @fnaflovergirl here on Wattpad. Congratulations to her for winning the Our Fault cover contest. PLOT/STORYLINE belongs to me. The events in this story are not canon and are simply for the entertainment of myself and my readers. Any OCs mentioned in this story also belong to me. MATURE CONTENT WARNING: The events in this story contain mature content that some readers may find triggering and/or disturbing. Read at your own discretion. Thanks!!

{COMPLETED} It has been just two weeks since the event that changed Papyrus' life forever. Too late, it seems, he realized what he had. And now that it is gone, he has fallen to pieces. How, or if, he will be able to cope, he truly does not know. And as if that wasn't enough, there are countless mysteries in store for this burdened skeleton-- coming from people he thought he could trust, and in places he thought that he knew. Will Papyrus ever be able to solve the mystery behind this devastating chain of events? Or will he, too, fall prey to the ever-expanding void that is engulfing the souls of himself and everyone around him? PLEASE NOTE: This book is the second in its series. It contains major spoilers to the first book, as well as this book may not make much sense without having read it first. So, if you want to keep the excitement of the first book without any major spoilers, I HIGHLY suggest going and reading that first. It is titled Your Fault. DISCLAIMER: UNDERTALE is owned by Toby Fox. UNDERFELL belongs to the AU Community. COVER IMAGE edited by me. I do not own the original image. PLOT/STORYLINE belongs to me. The events in this story are not canon and are simply for the entertainment of myself and my readers. Any OCs mentioned in this story also belong to me. MATURE CONTENT WARNING: The events in this story contain mature content that some readers may find triggering and/or disturbing. Read at your own discretion. Thanks!!