I have an Idea for an Undertale AU. And apparently, it's a good idea? So here, have a book. --- Long ago, two races ruled the earth. But when a plague of corruption swept through one species, causing a half of their population to attack the humans, the humans thought it safer to banish all the monsters underground. Now, the Underground is a Battleground. The battleground of the Pure and Corrupt armies. This Is UnderCorrupt. -- COMPLETED!

What if Classic was secretly Error, and he was assigned the role of being the Forced god of destruction? Also, Cover is not mine! #3 in Fgod Error as of 8/12/2020 #6 in Classic Sans as of 8/12/2020 #666 in Undertale as of 8/18/2020 (THIS IS CURSED NOW LOL-) #18 in Error Sans as of 8/28/2020 #288 in Undertale as of 8/28/20

Sans the Skeleton watches for humans for his brother Papyrus when one day, he sees a door. He walks up to the door and does knock-knock jokes. Unknowingly, he finds he has an audience. She answers. Then it's her turn. The two keep going, laughing their heads of. And before the could stop it, the began falling in love. But, the woman on the other side, Toriel cannot open the door in fear the child could get out. Or even worse, maybe the person on the other side mightn't like her., or recognise her. Some say love is simple. That is wrong. ~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~ The two leant on the door, bearing a heavy sigh. "The door is only thing stopping us from finding out who is on the other side." The pair said in unison.

Frisk is a little girl who is only six and is abused by her mother and father. How could she understand why she was beat when she didn't do anything wrong? No young child would fully understand. She never been loved or hugged when she was brought into the world. What if all that changes when two certain skeleton comes into her life and takes her away for their very own? ____________________ (FINISHED AS OF DECEMBER 2024)

What does it mean? It means that Sans is keeping to much shit to himself. The others relize this so they decide to do something about it. But what happens is nothing they would never expect. Sans shares his secrets unknowingly, but at what cost? *ALL CHARECTERS BELONG TO TOBY FOX!*

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

(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?

The sequel to A Knocking at the Door! Like the actual one this time! If you haven't read A Knocking at the Door yet, I would really advise you to read it now... You would be really confused otherwise! After the skeleton brothers and Toriel have lived in the closest thing to harmony they can manage, their world is about to be changed after a human falls into the underground. (Wow... I summed it up in one sentence... Well, one sentence without spoilers that is! It's gonna get pretty crazy!) (Cover is temporary (hopefully) before I can make one, but this art does not belong to me)

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**

When Papyrus starts going on dates Sans finds himself very uncomfortable with the idea of Papyrus being in a romantic relationship with anyone. "Am I just being over protective?" He's so troubled he asks friends for help and then starts questioning himself and his feelings toward Papyrus He gets an idea when he notices Papyrus's mailbox, which was always empty... "Oh this was bad..." "I should have never wrote that damn letter...I'm the worst!" "And now look what I have done to you..." Papyrus X Sans if you don't support Fontcest you don't have to read it...