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  • GasterSans! X Reader Chan
    33.3K 1.1K 21

    You're having flashbacks about the past and the life you had with real life monsters. You're feelings to one particular monster takes you to your limits, and you discover something extraordinary yet life changing. (sorry this sounds way better after one of my follows said it's really confusing so I'm sorry if it was)...

  • Darks Home: Undercodes {Discontinued}
    385 24 20

    I walk the path into snowdin the same one that my brother died on one year ago. I didn't forget how I feel I will kill frisk for this. I was wrong about her.I will never forget the pain the emptiness and the suffering she caused. Its been one year scene the genocide run everything went away but fate had other thoughts...

  • The Angel Of Death ( Reaper Sans x Reader )
    34.6K 1K 30

    You are Mother Earths youngest angel student. You where the next care taker of the earth while Mother Earth had to do business. You where walking to your new job when run into the killer himself... Death. But the longer he hung around you grow feelings for him, but is it destiny?

    Completed   Mature
  • Death Hates His Job
    4K 193 2

    Killing people isn't fun, especially when they're your boyfriend.

    Completed  
  • Ask/Dare All Sanses!
    3.5K 69 9

    You can ask/dare all Sanses...

  • 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  
  • Reaper in underlust
    84K 2K 15

    I just thought this would be funny to write. its where reaper sans gets traped in underlust for a week. This is going to have language and almost sex scenes. So if you are innocent don't read. But this has Underlust in it. No innocent people allowed there. Cover by @meow_meow-bee

    Completed  
  • **COMPLETED**Finding Family(Underfell AU)
    14.7K 596 35

    An Underfell fanfic. Can Frisk make it out of the Underground alive, and find what she was looking for? **COMPLETED 12/30/16**

    Completed  
  • The Underfall
    11.9K 677 14

    Story about Undertale. SPOILERS FOR GENOCIDE AND PACIFIST AND PROBABLY EVERYTHING ELSE TOO Frisk is a nice kid, who no matter what, will not kill even the strongest monster. Chara is a devil who will kill anything she comes across. What will happen if they switch worlds? Finally complete!

    Completed  
  • Underfell
    11.6K 439 9

    Hope ya guys like it! :)

  • Underfell
    3K 69 12

    This is a WIP so don't judge. I don't own any of the characters and concepts All rights to Toby Fox. I also don't own the idea of Underfell. I did not create Underfell and do not own any songs or ideas.

  • Underswap [postponed]
    4K 168 7

    I stand in front of the reset button. I done it many times before and I'm doing it again. I doing it because I want to change. I press the true reset... I wake up on the bed of golden flowers. I walk up to the room where Flowey should be in. But Flowey wasn't there, someone else was... Undertale belongs to TobyFox I'...

  • Don't Lose Determination |Underfell Sans Romance|
    2K 61 7

    Many years ago monsters were at war with the humans, but one brave man locked them away in a mountain. At night it is said if you go up the mountain and go down a secret hole you will be transported to the monsters evil lair. But that was just a myth right? Wrong. My sibling Frisk fell into that very hole and well I n...

    Completed  
  • Underfell
    1.1K 41 3

    Its been so long since they've seen the sun... The hope they once have had.... Its all gone... Human.... Can you... give them it back?

  • Welcome to the Underground (Underfell AU) (DISCONTINUED)
    16.5K 670 33

    "Welcome to the underground." Sans said with a harsh smile. His gold tooth glinted like the sun, reflecting off his sweat, making it seem as if he was sweating gold. I felt Flowey's vines tighten. Sans chuckled. "You won't make it very far." Credit, of course, to Toby Fox and his colleagues. Underfell is not my origin...

    Completed  
  • Underfell
    1.5K 74 4

    In the world of Undertale you can always redo your mistakes with a simple reset. But what happens if you reset too many times?

  • 100 facts of Undertale
    45K 919 95

    Everyone loves Undertale. Look at theses facts and love it even more!

    Completed  
  • Undertale : Stuck In Another Time
    6.9K 458 9

    Chara has the scary ability to jump into savefiles and corrupt them by taking over the fallen child and making them do a 'Genocide Run' When Chara comes across a continuing timeline that has reached the surface but has not yet been reset under the name of 'Frisk', curiosity takes over and they leap into this save file...

  • Undertale Mob AU
    18.1K 567 10

    This Undertale fanfiction follows the lives of various members of the Monster gang.

  • Down into hell
    5.1K 238 12

    Frisk comes back to the underworld but it has changed. Can frisk save everyone or will they die for good?

  • Error!Sans x Aftertale!Sans
    3.6K 110 1

    Don't ask where I got the idea... I just learned about Error Sans and I've always loved Aftertale Sans. I instantly fall in love with every Undertale AU, even UnderFell. Most art of it is just creepy. I'll do more Sans au ships if wanted. For example; Sans x Underfell Sans Swaptale Sans x Sans Error Sans x Underfell S...

  • Ask/dare Foxica: The Beginning
    7.3K 519 164

    Well If you read 1 & 2 congrats so this Is a Present for almost 350 reads on the first so you can send as the title says ask or dare the characters from the book by commenting it's very simple and very fast plus I added a new cover so If it's different dont freak out so yay for interactivity! Rated: Teen Reasons Swear...

    Completed  
  • Sans' Pun Book
    12.9K 639 13

    You didn't ask for it, but the pun master will share his puns with you.

  • Sans' Punny Book of Puns
    183K 7.2K 36

    Just don't get into the bone zone, it's very bonely.. I'm sorry, I'm not very humerus. Have a Sanstastic time reading the book! You won't regret it.. Okay, maybe. These are very cringe-worthy.

    Completed  
  • Dare Undertale AUs
    47 4 2

    YES. YES. YES. HELLO THIS IS MY NEW BOOK. I WILL UPDATE WHENEVER I WANT, BOOOOOOOOOK.

  • Undertale AUs, Headcanons, and Other Dumb Things
    6.9K 189 39

    WARNING: This book (thing) contains spoilers for the game Undertale. If you have not beaten the game and don't want it spoiled for you then back out now! If you want to know more about any of these just ask. Note: some AUs may have plot holes. I'm working on them (I'm open to suggestions) Undertale (c) Toby Fox

  • Undertale AUs (in my opinion)
    19.7K 610 34

    Hi! This is a random idea I came up with, and in it, I'll be listing every undertale au I know of, and (at least) every main character within them. In my point of view, of course. If anyone wants to share their views on any of them then fine by me, also tell me if there are any I missed and should check out. Also note...

  • Ask My Undertale AUs!
    621 12 21

    I made some AUs so you can ask them questions and dares. The AUs are: Rainbowtale Darktale Magictale Musictale Underwater Nethertale Furrytale Firetale Holidaytale So yeah ask and dare them.

  • Sans X Reader Oneshots
    61.2K 1.3K 14

    Welp. A book about Sans the Skeleton from Undertale. Not just from Undertale though.... DIFFERENT AU'S!!!

    Mature
  • AU Sans X Reader :3
    64.4K 492 14

    It has undertale sans underfell sans reaper sans swap sans and underlust sans and then I'll add meh own AU its called spytale Its kinda meh first lemon thing so plz enjoy :3