Echos Of Madness

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Sans went to void gaster trying to bring him back find soul amp and add it to sans make his bone red after while of genocide runs amp convince Sans to kill everyone to power up human more they kill more both of them lose in madnessPublic Domain

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There are 3 alternate timelines of the original Classic Sans, with each of them become extremely powerful under very unique circumstances. There is Geno Sans, who had injected DT into his own soul, and had died, forcing him to reside inside of the Save Screen, in order to stay alive in this place. There is Color Sans, who had absorbed the 6 human souls in order to become more powerful than ever before, but was erased from existence when he killed the human, and went into the void, being forgotten by everyone that knew that he once existed. There is Seraphim, who had acted fast and quickly killed the human, who's name is Frisk, before they went to the king and was controlled to start their genocide, and absorbed all 7 human souls, become the most powerful monster of infinite power amongst his kind, before he had been teleported to the void by the souls when Alphys tried to remove them, which nearly killed him. All 3 of them are versions of Classic Sans that went to a void, or a place similar to the void, in the case of Geno Sans, in order to survive. But what happens when these 3 extremely powerful versions of Sans meet, when they go into a version of Judgement Hall?

Bringing people back into existence doesn't generally have negative repercussions. Not for an entire world at least. So why don't we use the same idea for an all powerful entity and see what happens? Unfortunately, this world might not be up to the challenge. ---- What's this? An Undertale fanfiction? Yes, that's exactly what it is. This takes place after a True Pacifist route so spoilers if you haven't played it (which you totally should, go play now!) Currently being edited...

Mafia in the Overworld (Sequel to Mafia in the Underworld) by SuperUnderLittle

Lazara died in the hands of another Mafia group years ago. Sans finally moves on with a new girl, Alphys brings the rest of the AU characters from the already transfered characters into their AU, Litho is older and everyone finally lived in peace. But, Lazara finds herself somewhere lost between two worlds. Not dead, not alive either. But lost in the void. She should've been forgotten, but she wasn't blasted through the core like Gaster. He gives her a choice. Fuse with him and escape with him or stay in the void forever and melt like he did. Lazara doesn't go for the ladder. Sans doesn't know who to choose. Litho barely remembers her. Gaster has to stay near her. And she has motherfucking powers?! Fuck this is a drama. (has lemons, gore and crazy shit and sad drama)

Bloodfall (An Undertale AU) by BlackStormWolf

Ever since the death of his younger brother. Things have gone downhill in the surface world for Sans. Alphys died a few months after Papyrus to a disease, Mettaton and Undyne, especially Undyne, had fallen into a depression. Flowey dissapeared into mt. Ebott, not to be found and Sans is fighting depression and insanity. One day, Sans discovers a suspect to his brother's death. A being that is trapping anyone who had either fallen into Mt. Ebott or stayed behind in snowdin for a while. Sans, along with Frisk and Undyne, go into the underground themselves to confront this being. They must encounter the Bloodfall that traps and kills anyone who dares pass by waterfall. (This takes place after a true pacifist run if one killed Sans in a Genocide run, but reset their game before getting to Asgore(I did this in a way to quit the Genocide route). This is if Frisk choses to do this the Pacifist way. I might make a Genocide one in Story Shorts. Also, My Sans is a human, but feel free to interprate him as a Skeleton if you ever choose to use this AU. Just credit me!)

Undertale:extended genocide (discontinued) by Anexistingperson

Undertale AU about sans escaping to the surface on the 100th genocide run.

Chainsmoker [ Gaster!Sans x Reader ] by morrow-

Routine. The entirety of every living thing is dominated by it, human or monster. Everything HAS to be the same. It was in this that you were the exception. For you everything was new, every time line a detailed altered in order to satisfy your sadistic desire for a new ending, whether it be only a few details of dialogue altered or something else entirely. Monsters you once considered family you now butcher and slaughter without a second thought, after all, that's what the Reset is there for, right? And all at once it stops. Your small hold over the Underground is ripped away from you and you are thrown into a dying timeline, monsterkind's final attempt at self-preservation. You're alone, completely and utterly alone. Except one. And he has a bone to pick with you.

Gaster! Sans X Neko Reader by CheetahDoesF1ction

War broke out. You were in it. Lost. Insane. Scared. You hated humans. You killed any of them you saw. But you promised to yourself you'd never hurt Frisk.

Underfell Skelebros backstory! Technically a prequel to my story, "A Three Way SWAP," but you don't need to read that to understand what's going on. Takes place in the world of Underfell. We learn what happened to Papyrus to make him so cold and distant in Underfell. WARNING: MILDLY VIOLENT AND MENTIONS SUICIDE. GETS A LITTLE DARK. YOU'VE BEEN WARNED.

after losing a bet, Red has to take sans out on a date. Red doesn't like his alternate, but it's nothing personal. He just dislikes how the 'Tale brothers have a bad relationship. turns out he put the blame on the wrong brother Its fucking uh,, sans / red / edge so watch out for that shite

Undertale: A Sans x Frisk Story: You're My Hero {COMPLETED} #wattys2017 by chescacutie1811

A human named Frisk went to Mt. Ebott and fell into the underground. She befriend all of the monsters of the entire underground but some monsters still bullies her but a skeleton named Sans will save her all from that incident

Soul Trait Trio

There are 3 alternate timelines of the original Classic Sans, with each of them become extremely powerful under very unique circumstances. There is Geno Sans, who had injected DT into his own soul, and had died, forcing him to reside inside of the Save Screen, in order to stay alive in this place. There is Color Sans, who had absorbed the 6 human souls in order to become more powerful than ever before, but was erased from existence when he killed the human, and went into the void, being forgotten by everyone that knew that he once existed. There is Seraphim, who had acted fast and quickly killed the human, who's name is Frisk, before they went to the king and was controlled to start their genocide, and absorbed all 7 human souls, become the most powerful monster of infinite power amongst his kind, before he had been teleported to the void by the souls when Alphys tried to remove them, which nearly killed him. All 3 of them are versions of Classic Sans that went to a void, or a place similar to the void, in the case of Geno Sans, in order to survive. But what happens when these 3 extremely powerful versions of Sans meet, when they go into a version of Judgement Hall?

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