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  • Romeo and Roulette (Mafiatale Sans x Reader)
    68.8K 2.5K 37

    There are certain street rules branded on the hearts of the people of Chicago. Certain rules like always watch your back. The city is thriving with mafias, all of which have a rivalry against each other. Each Mafia has there own contracts and if someone steals it they're dead meat. But what happens when the mafias ha...

  • Gaster x Reader- Not Your Fault
    106K 3.3K 13

    You're a human who has fallen down into the underground. There you meet a certain skeletal scientist and his sons. Will you get close to the family or will you become their enemy. Loosely based on TheBombDiggity666 Dadster comics (which you should totally check out if you haven't already) and occurs before frisk's ap...

    Completed  
  • The War Amongst Us (W.D. Gaster X Reader)
    64.5K 2.9K 24

    (Y\N) is a young female spy and soldier fighting in the War of Humans and Monsters. She is fighting on the humans' side of the war until a turn of events when she becomes apprehended by the enemy. What will happen when a young monster scientist tries to change her views? Thanks to Itachei on Deviantart for letting me...

  • Do you Trust me? (Underfell sans x Reader story)
    37.6K 900 19

    Making friends with others may sound easy as you think! But the thing that starts betrayal is breaking their trust Hah! Got your interest? It better! Feelings are coming up your way....

  • Your Life?! (UF!Sans X Reader)
    51.6K 1.5K 8

    WARNING: Lots of swearing, blood, cruelty and slight sexual themes!!!! Sans and Y/n are arch enemies. They can't go a second without insulting the other. But one day an...accident happens, forcing them to co operate until they find a sulotion to their "situation". But before that, they learn a lot about each other and...

  • Underfell Sans X Reader Lemon
    26K 129 7

    Hope you enjoy reading this

  • Hidden Inside (Gaster!Sans X Reader)
    85.9K 3.4K 31

    After the monsters are set free, they aren't too keen on befriending humanity. They won't show themselves yet. They will get revenge on the war the humans had waged years ago. Now they attack in secret, getting patrols and assassins prepared at nightfall. One of the pairs of assassins is Gaster!Sans and his brother. W...

  • G!Sans X reader
    93.4K 2.4K 20

    Now, you're about to read a story where YOU are the main character, if you're a fan of echotale and G!sans then this is the right story :3 Its my first story so please do not expect the best, but ill try :) Otherwise i'll be posting stories with other characters when this is done, hope you'll enjoy! :') Love ya!

  • Sorry About That (Gaster!Sans x Reader)
    87K 4.3K 27

    You worked for the newspaper, doing a simple editing job and a few other things here and there. Ever since monsters came out of the ground, though, rent has sky-rocketed for you. You thought you could deal with it, but after a few months you need a roomie to help with the rent. Which, fortunately, you got one! But, un...

  • Horror Sans X Reader
    141K 2.5K 27

    You know what it is about except I'm gonna add that you were abused by your family. And there might be some things that get really close to Lemons.... or are Lemons.... that's kinda up to you personally if it's a lemon or not...just to let you know! You have been warned.

  • Mafiatale!Sans x Reader
    34.6K 811 25

    You're a 19 year old girl (change it to boy if ya want). You steal, kill, and are a major criminal. You also have a little posse. You are the leader of a group of two other girls that are also criminals. One day, you take on a task allowing yourself to meet your idol and his friends. But what if you developed feeling...

  • the light in the darkness ( reaper!sans x Goddess!reader )
    52.8K 1.1K 36

    so, uh I got this idea from another story ( please don't tear me to shreds I son't remember the name I jut REALLY REALLY LIKED IT BUT I BELIEVE THEY ARE DISCONTINUING IT ) you are the goddess of darkness you are like a rebel and brake rules .....

    Completed  
  • Stuck in Between (Reaper!Sans X Reader)
    122K 4.8K 20

    When your heart stops, you're supposed to stop there. But when your heart stops in the Underground, your soul resets. But what if the reset doesn't work. You're stuck in a stalemate between life and death after your attempted reset glitches. Memories fuzzy and distant, lonely and cold, what does one do to survive thei...

    Completed  
  • Eyes of Stone (Gaster!Sans x Reader)
    59.8K 3.2K 52

    His eyes were like stone, cold and dead against the blank snow. Hers were like melting frost, swimming in glacial lakes like an undisturbed winter. It was journey of finding and losing her, an adventure of losing and regaining him. A trial to see if their love was truly set in stone. (SEQUEL TO 'EYES OF FIRE') (FANFIC...

    Completed  
  • Gaster x Reader (Probably will be a Lemon)
    36.5K 815 8

    So I was really inspired to keep writing stories by someone who commented on one of my stories. You know who you are. I've been on here a lot and I've seen people actually reading my books... I'm so happy ^_^ Anyway... A backstory and How to read an X reader will be the first chapter... This'll probably end up being a...

  • The girl ~=~Gaster!Sans X Depressed!Reader~=~ #Wattys2016 (COMPLETE)
    100K 3.2K 42

    She stopped trying to ignore it all. She stopped trying to act like it didn't hurt. She stopped trying with it all. The only way to get away.. was to escape.. But what if someone stops her.. someone, she'd never expect. Maybe someone.. she had met before. ===============================================================...

    Completed  
  • G! Sans x reader
    22.8K 606 8

  • Deadly smoke. (Gaster sans x reader)
    19.4K 605 8

    Jbeckeqougcqcluh3i i

  • Eyes of Fire (Gaster!Sans x Reader)
    270K 11K 63

    (FAN FICTION BASED OFF OF VIDEO GAME 'UNDERTALE') His eyes were like fire. Amber. Dangerous. But they intrigued me. The flames of his soul danced and encased my heart. It was needless to say that I didn't mind. (COMPLETED)

    Completed  
  • Lost Without You (Gaster!Sans X Reader)
    76.5K 3.5K 18

    This story will contains things such as ABUSE, CAPTIVATION, VIOLENCE, ect. This is the only warning I will give, so if it's not your cup of tea- sorry about that! . . . Death. War. Violence. A world torn apart by two separate races. In a place like that, can peace even exist? Will you fight for your freedom as a human...

  • TRAPPED - Gaster!Sans x Reader
    18.2K 655 30

    (Cover Art is not mine.) You don't remember who you are, or who you used to be. You've woken up in an abandoned costume shop with amnesia, after the second human and monster war. The monsters were victorious this time, and practically all that's left of humanity is trapped in the Underground. You find a journal explai...

  • Old Friends (Gaster Sans X Reader)
    27.1K 895 6

    (Im new to Gaster Sans so im going to make him a bad a##) It's been years since you last saw the underground, and the skeleton brothers. But when your beat up by your friends for the third time you decied its time to go back to Mt.Ebott and say hello to your old friends.

  • Matchmaking: Gaster Sans X Reader
    9.3K 416 3

    It was a simple project for your programming class- to make a matchmaking app. Only catch, everyone's partnered with the opposite gender, so each gender gets input on the app. And it's even worse when you get partnered with a flirty skeleton.

  • Manipulation [EchoFell Sans X Reader]
    18.9K 504 6

    It has been a year since the monsters were freed. You had literally been through hell and back with them; changing every single one of their personalities around as much as possible. Being EchoFell, the only one who was actually nice to you in the beginning was the timid plant. After a while, things were really lookin...

  • Save me or let me go
    123 10 3

    GasterSansxReader Trapped somewhere, everyday is nothing but dark, darker yet darker. -Author Is terrible at summaries-

  • Darn Hot Skele-Guy... [[:]] Gaster!Sans X Reader [[:]] [D I S C O N T I N U E]
    44K 1.4K 25

    I.. I don't know why I'm writing this..

    Completed   Mature
  • UF!Sans X Reader (Finished)
    110K 2.6K 42

    Unlike other stories, monsters and humans have already joined. Nothing was ever easy for you AT ALL. Your mom died when you were 6, and ever since then, your dad was.... different. Your a 17 year old girl, and you ran away when you were 15. You decided you couldn't take the pain. Hope you enjoy my story, and sorry if...

    Completed  
  • HP (W.D. Gaster x Reader)
    57.3K 1.8K 20

    You lost your father in the war against the monsters. If it was up to you every last being that fought against man would be sent to execution. But it wasn't your choice.... unless it was? That's when you decide to visit the underground. All you needed was one excuse to rage another war against the monsters this time...

  • Corrupted Timeline: UF!Sans X Reader
    96.5K 3.5K 31

    While hiking with your family at Mt.Ebott, you end up falling down a hole in another world where you encounter monsters who want to kill you. Will you be able to change their hearts and bring back hope? Or will you be killed trying?

    Completed   Mature
  • To Love A Demon (Gaster!Sans X Reader)
    106K 3.9K 30

    *Do you fear me? "N-No" *Are you sure? "Yes." *You will learn to fear me Heh. Well here we are! I hope you enjoy this sin. I'm going to take my time and let you learn to love the characters slowly. So if you're the ones who like lemon in the first chapter, this is not for you. *Don't worry sweetheart. It will be worth...

    Mature