Slipping Into Insanity

Reads 563
Votes 14
Parts 13
Time 1h 15m

Reads 563
Votes 14
Parts 13
Time 1h 15m

Mature

Sans has been through one genocide run, but the human didn't stop there. How long will Sans last before he completly looses it and does something he might regret?All Rights Reserved

dusttale

Table of contents

13 parts

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(Sans x Reader) When Two Souls Meet by ZanaBSparrows

Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over and over again. Sometimes, he'd even done the killing himself. And no one ever remembers. Not even the kid herself. It's an exhausting cycle, one that never seems to end. But there's something different about this run. Another human's fallen down... the kid's sister. Please note the the story is primarily on Quotev, so updates to Wattpad may be late, or lag behind that of Quotev. The story also has the potential to become mature. (I haven't decided yet.)

Lost Souls (Sans x Reader) by Styla_Mythic

While Frisk is trying to maintain peace between monsters and humans, Sans finds himself tangled up with one the has a dark past and a hate filled grudge against all monsters. While she seemed like a vile human...Sans found himself seeking answers to why she hated everyone. Is risking his life for this girl worth it?

You've reset so many times just wanting to get something new. It didn't seem to work. You gave up and kept the time you were in going. Monsters were above ground. Humans have accepted them. But you, you wanted to keep going but you made a promise and you plan to keep it as long as you can. Sans kept a close eye on you while still considering you as a friend. You loved the world you were in, and you don't want to reset, but what if something happens? What will you do? You try to keep our if trouble, but... it's hard. Everyone seems to go against what you say, but you attempt to keep it hidden. But sometimes, you break. Everyone has those moments. But no matter what you won't reset. Never again. That's your promise.

College Letters [DISCOINTUED] by luciliri_

Sequel to "HighSchool SweetHearts~" please read that story first for you to understand this story!! I dont really know how to make desc. So here i go: Sans finally going to College called "Silver Gem University" or SGU, one of the most high-tech university ever. Sans wasnt happy since he has to leave his skeleton in red.. It really shatters him but he will visit once a while, It was a 5 hour trip to go there so he just looked out the window, what nice skies. He was about to fall a sleep until he saw some one sat across from him. He looked up and this monster was a cat monster not quill, but he did look almost alot like her, blonde hair but a bit darker wearing a purple jacket and white shirt that has the youtube logo on it. Well i guess i should say something to not be rude. I would feel uncomfortable to if someone just stares at me without a word. "Hi im sans, nice to meet you!"

Someone Really Cares About You... by animeluver15

Timelines; a word you don't seem to understand after going through a genocide run and sparing Sans before restarting. Now you've restarted, forming lost relationships you forgot you made and forming a stronger bond with the punny skeleton himself, Sans. It seems if you want to find out more you'll have to read. SPOILER ALERT: This does rely highly on the actual Undertale game. If you haven't played it yet or are planning to then I suggest you don't read. However if you're cool with spoilers or have played the game then enjoy! I hope you have a very... HUMERUS time!

At the end of every genocide run, Frisk duels with Sans and wins. However, what if Sans begins to care once more and takes the blow in replacement of Papyrus? Who will lead the dance of fate with Frisk in the Judgement Hall?

HIS TALE...(My Sans turned to Dust to Dustdust to revertdust Sans OC) by lazierbones55

My sans oc backstory and all transpired in his existential. BUT HIS KARMA NEVER LEAVES HIM...

Murder!sans was hated by everyone, all AUs, everyone in his own AU. But what happens when he meets a cute, forgiving skeleton, who will risk his life to make him smile again...

Warning! There is a chance that there will be spoilers for the pacifist run of undertale. I recommend finishing that before reading this. There won't be any spoilers for the no mercy run, so don't worry about that! Also, don't worry about anything NSFW/lemon if that's not what you're into-there won't be any of that here. You're a human that's fallen down into the underground. You've decided that you'll stay instead of going home after fighting Asgore and sparing him. Now, you had made some great friendships while in the underground-but one of those friends in particular was one you'd like to be a little more than friends with... Aaaa an X reader fic! I haven't done one of these before, but I hope you still like it!

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!)

*DISCLAIMER* I DO NOT OWN ANY IF THE THINGS I WRITE ABOUT - NOR THE ART This fan fictions takes place after what's called a Genocide Run in a game called Undertale. "Do you think that even the worst of people can change? That even after what they do, anyone can be a good person?" Frisk thinks this is true, but not for her. After resetting after killing every monster in the underground by being taken over by Chara, she fears to get close to her once friends. After Chara threatens Frisk if she didn't kill one of her favorite monsters, Sans the Skeleton, she begins to distance herself from everyone; including herself. Will Frisk figure out how to defeat Chara and have a happy ending once again, or will she succumb to the pressure and begin the slay every monster- just like before? Edit: I own Fuse, but none of the other characters. Original Sans the Skeleton is owned by Toby Fox and any variation other than Fuse is not owned by me. None of the pictures are mine and I found most of them on Google so I don't know who they rightfully belong to. Another edit: I changed the name to Fused

Try Again (InfiniteHourglass Au) by NotSoSugar

He's made mistakes. Some small, some absurdly daunting. But he can work through it, he can just...forget the past. Except he can't, it simply continues to haunt him. And his time in the scroll only made it worse. And then an artifact comes into play. Now comes the big questions: Will he fall again? Mess up? Hurt everyone once more? Or will he make this line of time...better? Happier?

This is Glitchtale, but the beginning is different. Instead of Sans being his usual self, he turns into himself from Dusttale, where he killed all of the monsters and gained some of their magic. How will this affect the history of this fusion of 2 timelines, especially when Dust becomes a part of the outcome? And more importantly of all, what other surprises will wait for him when all is said and done, when he is finally through the huge torment? The pictures in the story don't belong to me. Alphatale belongs to Shadikal15, as well as the concepts he has made. https://vibeless15.tumblr.com

Undertale Genocide Story (COMPLETE) by Espinozaj1

This is what would happen if Sans's prediction in Undertale Love Story was correct and one of the humans did, in fact, do a genocide run. let's find out!

The Eclipse Rebirth|Target Settled Sequel| by LaliaShy

With Nightmare coming to terms back to his original form he still struggles to fit in as the prince of darkness, however in the shadows many followers haven't approved of the outcome of two monster's strong connection with love or the prince's return. When a spirit comes back to life, with a new physical form and is seeking out their desires, what will happen to the multiverse? Can Ink and Error keep the balance for the sake of its protection? And what will the newly wed couple Killer and Outer do when they receive life-changing news? ┉┉┉┉┉┉┉┉┉┉ •Protagnoists- Killer + Outer ✧༝┉┉┉┉┉˚WARNING˚┉┉༝✧ •Strong Language •Mentions/Actions upon; Suicide and Self Harm •Dark Re-acurring themes If any of these topics make you uncomfortable or any sort, I suggest to not reading. ✧༝┉┉┉┉┉˚*❋Credits✧༝┉┉┉┉┉˚*❋ •Undertale- Toby Fox •Outertale- 2mi127 •Killertale- Rahafwabas •Cover Art- LailaAngel ❋*˚┉┉┉┉┉✧┉┉┉┉┉˚*❋ •Started- June 5th 2020 •Finished- July 6th 2021 •30 Chapters

Into The Game >> (Sans X Reader) Undertale FanFiction by Melody4164

It was just a normal Saturday. (Y/N) was playing Undertale for the millionth time. She was obsessed. (Y/N) had played all of the routes. True Pacifist, No Mercy/Genocide, Neutral. She experimented with killing certain characters doing different things. Then, as (Y/N) started a new game, she felt a falling sensation, as if she just fell out of her chair. She blacked out soon after. When she woke up, she was lying on a bed of golden flowers. She knew this place. (Y/N) was in the game. She had taken the place of Frisk and was in the Underground. •Disclaimer I do not own Undertale. It belongs to Toby Fox. I do not own you. You own yourself. I do not own the cover or any of the pictures that will show up in this book• *If you're reading this as a guy please just change the pronouns to he/him/his. I find if a lot easier to just put female pronouns. Thanks! :3 *

cover art isn't mine and belongs to its rightful owner Error is finally ready to give in. The multiverse he spent so many eons protecting and keeping the balance is rebelling against him. The AUs he has spent so long protecting are rebelling and are soon to be destroyed, but worst of all, all of the Sanses hate him for some reason. And I mean ALL. Why should he continue? There's nothing to live for anymore. Not even his family can help with this. Or, the people he thought to be his family.

Into Hell - Book Two of Into The Game >> (Sans X Reader) by Melody4164

(Y/N) is finally ready to go back to the monsters she holds so dearly. After about a year of mental and physical training she has finally gotten her emotions under control. But has she gone emotionless? After plugging the thumb drive with her save file on it into her computer, (Y/N) soon discovers something. In a desperate attempt to save themselves, or maybe just a way of revenge, Chara corrupted the save file. Now, all the monsters that (Y/N) befriended are out to kill her. Can (Y/N) survive? Will she defeat Chara and find a way to get her friends back to normal? Or will she instead join Chara and erase everything? Find out in Into Hell. Once again I'm making the gender pronouns she because it makes it so much easier to write, which means quicker updates. I'm really sorry if your a male.

Last Breath of the Genocide by adamabyss12

Many Genocide Routes have past for a very long time, for it has gone for so long, and all known aware by one single monster. But each of it was dealt with in different ways. With one that continues to fight, even when the odds are against him. And another, when he went mad and killed off the rest of his kind. But the outcome of each Genocide...it always ends the same. A mysterious door, it opened, and within it, is someone lost inside of the void, as they aid the ones that had awareness of what was going on, but not to the fullest extent. But what happens...when both of the routes collide together? What happens when the both of them, despite being of opposing alignments, work together to stop the Genocide? (The version of Last Breath will be based off of the one from Fantasy Violin, and the Last Genocide will have both his usual powers and the powers of his Fanon FDY Self, meaning he has all the powers of the main monsters he's killed. I'll even use some elements of Revolver Animation's Last Breath vs Last Genocide animations)

What if thinks went just a little different when Error fell? What if someone really loved him? What if he loved someone even with all his positive emotions stolen?

(Sans x Reader) When Two Souls Meet

Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over and over again. Sometimes, he'd even done the killing himself. And no one ever remembers. Not even the kid herself. It's an exhausting cycle, one that never seems to end. But there's something different about this run. Another human's fallen down... the kid's sister. Please note the the story is primarily on Quotev, so updates to Wattpad may be late, or lag behind that of Quotev. The story also has the potential to become mature. (I haven't decided yet.)

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