Undertalefanfic Stories

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360 Stories

  • I Promise (sans x reader) by harley_177
    harley_177
    • WpView
      Reads 7,547
    • WpPart
      Parts 24
    Y/N was a normal teenager who gets bullied everyday, she has only one friend who called 'Frisk' one day they decide to climb the mountain but then... "I want you to reset" 🚫TW🚫 SO CRINGE AND FULL OF MISTAKES, I DON'T RECCOMEND READING IT!
  • Identity Unknown (Error Sans x Reader) by justakidfrom
    justakidfrom
    • WpView
      Reads 859
    • WpPart
      Parts 7
    Mainly for myself
  • Apathy •[Undertale]• by AsrielLovesChara
    AsrielLovesChara
    • WpView
      Reads 781
    • WpPart
      Parts 4
    A•pa•thy /adjective/ lack of feeling, emotion, interest, and concern. ~~~ I wake up and I go to work. I see faces, and I instantly forget them. Everyday, the same thing happens. Today, however, I see someone rush to a room, then more people. Then I hear screams. Then the police are here, asking me questions. I might have just witnessed a murder, but my lack of caring caused me to forget every important thing.
  • The Howling {Sequel to Ripped Away} by Sno_The_Owl
    Sno_The_Owl
    • WpView
      Reads 12,507
    • WpPart
      Parts 12
    Encre and Fallacy have exactly what they want. Peace, and a good life set ahead. But, a faint howl, and echo seems to remind them of something...
  • Different beings ( Charisk fanfic) C A N C E L L E D by jadyn_the_comicer
    jadyn_the_comicer
    • WpView
      Reads 2,397
    • WpPart
      Parts 7
    Two gender neutral kids find each other locked with love but there is always a halt as they are two different beings inside but the same outside. *im sorry if this isn't the best I don't really get involved with undertale, but I just hella love charisk
  • yandere sans oneshots by LillyIsMyOc
    LillyIsMyOc
    • WpView
      Reads 6,391
    • WpPart
      Parts 4
    suggest oneshots to me there is a HUGE chance I will do yours ^-^ oh and I will do lemons, smut, and fluff :3
  • NIGHTMARE X [FEMALE] READER by GalaxyTheFur
    GalaxyTheFur
    • WpView
      Reads 202
    • WpPart
      Parts 1
    ⚠️WARNING: LEMONS 🍋 PLEASE READ AT YOUR OWN RISK⚠️
  • Your Friendly Neighborhood Skeleton- A Sans x Reader Fanfiction by EmotionlessAnon
    EmotionlessAnon
    • WpView
      Reads 345
    • WpPart
      Parts 5
    When Frisk fell from the surface... Things have been going awful. The monsters were dying one by one by their knife. Slaughtered everywhere. And the human was almost there to meet the king. ASGORE. But when you fell down, you had the ability to restore them. But only one monster knew about your power. And his name was Sans. Will you and Sans be able to restore all the monsters in time before Frisk kills everyone in the underground?.
  • Into the Darkness ‖ GF X UT by StarFallerXD
    StarFallerXD
    • WpView
      Reads 878
    • WpPart
      Parts 4
    While exploring Mount Ebott(which was one of the mountains that surrounded Gravity Falls), the Mystery Twins Dipper and Mabel accidentally fell into a huge pit, which led them into the underground where the monsters lived and roamed around. Will they be able to make it out alive without hurting anyone? Or will one of them slowly turn into a megalomaniac? ===================================== I DO NOT OWN ANY OF THE CHARACTERS ALL OF THEM RIGHTFULLY BELONG TO ALEX HIRSH/DISNEY AND TOBY FOX
  • Sans by Ink-sanz
    Ink-sanz
    • WpView
      Reads 49
    • WpPart
      Parts 2
    'Don't forget'
  • Momma CQ (Sad) by JalenaFoxy
    JalenaFoxy
    • WpView
      Reads 1,244
    • WpPart
      Parts 2
    This is a sad story.
  • Not naive | Undertale Fanfic by Blue_Stories_
    Blue_Stories_
    • WpView
      Reads 15
    • WpPart
      Parts 1
    SOME OF US AREN'T LIKE YOU THINK. ~THE GREAT PAPYRUS Credits ~ Cover 1: ??? Cover 2: alldrawnup
  • DOCTORTALE by ThetaSigma123
    ThetaSigma123
    • WpView
      Reads 30
    • WpPart
      Parts 2
    The TARDIS is crashing! The Doctor has one left decision: land somewhere. He checks the scanner, it says: LOCATION: Mt. Ebbot TIME: 201X Oh dear, it's gonna be a whopper. (Ok, I have NO idea if this is an AU or not. Let me explain, I think it Is NOT cuz it's just in the main universe that we are in now. I also have a theory that Mt. Ebbot is Time Locked so nothing gets in or out except... MORE ON THAT LATER! Now, I think it IS an AU becuz instead of Frisk being the fallen human, it's the Doctor so, yeah. I have another theory that the 8 fallen humans (children? I forgot) is a fixed point in time which cannot be rewritten, so overall, it's NOT an AU after all) (actually that's only if you stick to the rules of Doctor Who, which I am) Written By John Smith//Theta Sigma
  • Pain Killers  by NekoCrossInk
    NekoCrossInk
    • WpView
      Reads 90
    • WpPart
      Parts 2
    Geno is stuck in a pitch black void, forced to watch his friends die all over again on a screen. He soon begs for death but something surprising happens.. someone comes but it isn't Frisk... but who is it? Neko here, fourth book. All art belongs to me. Warnings// Angst | suicidal thoughts | smut/lemon | profanity (swearing) | ((possibly more))
  • Error Oneshots 💙[REVISING SLOWLY] by PaintK1ller
    PaintK1ller
    • WpView
      Reads 1,778
    • WpPart
      Parts 8
    Hello there! Charlie here! this story will be based off of one I read, but can't find...(I think it got deleted) And I can't remember the the OG author qwp IF YOU ARE THE OG AUTHOR/REMEMBER WHO IT IS, PLZ TELL ME QwQ Ships in this story: Errorberry Killer x Horror x Error Error x Fell Insomnia (Dream x Error) Error x Lust Error x Fresh Error x Classic Toxic Errink Stretch(Carrot)x Error Nightmare x Error Cross x Error AND Error x Dust :3 (I think that's it?) Go ahead and guess his mates.(There's 4 in the end) STORY RUNDOWN⚠️ Jerk makes Glitch in heat heat makes Glitch have to fuck everyone to find mate(s) Glitch horny af and happily is Sub in all ships Blue is not a mate, but close friend to help him💙 Safe word is pineapple 🍍 lol ENOUGH SPOILERS! will update when I can! :p EDIT:(Dec-31-2021) I added a mate lol Jan-17-22 #4 In CrayonQueen💜
  • Hand in unlovable hand | Killer Sans X Female!Reader by PhoenixQueen0415
    PhoenixQueen0415
    • WpView
      Reads 318
    • WpPart
      Parts 2
    The world you live in is a cruel place, running rampant with criminals, serial killers, and corrupted authority. Good traits such as justice and kindness are few and far between. Stained with a blurry past, you find yourself as a detective, determined to help cleanse the city of its underlying madness. Just when a mysterious new neighbor drags you down a rabbit hole, bringing out the subconscious motive that lay underneath your determination
  • Reacting to Ships! :3 by SansxFriskForever101
    SansxFriskForever101
    • WpView
      Reads 2,763
    • WpPart
      Parts 9
    title says it all.
  • Undertale Reacts || Truth or Dare, Q&A, Reactions, and More! by theonly_creampuff
    theonly_creampuff
    • WpView
      Reads 1,441
    • WpPart
      Parts 4
    This is story where the characters from Undertale will answer your questions, do some dares from you, react to things you want, and even meet characters from other fandoms (if i know them, of course) !!
  • Overstory Chapter 2 (an Undertale x OC Fanfic) by ReaperPH
    ReaperPH
    • WpView
      Reads 38
    • WpPart
      Parts 8
    One year has passed after Hugo Cross was defeated by his brother, Carter. He(Carter) and Frisk just turned 18 this year and the descendant of a Hate Demon known as Kurayami named Shoma has started a genocide run in New Home II. The Royal Guard are currently searching around for the murderer but their not alone, Carter and his friends are with them in the hunt Note: This is a sequel to my Undertale x OC fanfic called Overstory Chapter 1, please read it first if you do not want any spoilers. Sorry if there are grammar and spelling corrections btw WARNING: This fanfic contains strong language.