Undertalefanfic Stories

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360 Stories

  • Oh yes! (Mettaton X Reader) by TheGothicPrince
    TheGothicPrince
    • WpView
      Reads 29,918
    • WpPart
      Parts 41
    This is the first fanfic I've ever written so plz don't judge. Reader-Chan is a female BTW but guys can read too. I hope u enjoy it! ^-^ COVER IS NOT MINE
  • A New Falling by AlphaAndOmegaWolves
    AlphaAndOmegaWolves
    • WpView
      Reads 18,418
    • WpPart
      Parts 21
    A Goat!FriskXAsriel Fanfiction After the Barrier is destroyed by Asriel, he is doomed to turn back into Flowey once more. Lilac (Frisk) desires otherwise, and gives the fluffy goat some of her Determination. Some of Asriel's magic flows into Lilac, and as a result, she turns into a goatlike Boss Monster, and their SOULs become a hybrid of Determination and monster magic. Asriel returns to the Surface with Lilac, and receive much joy from monsterkind, and he and Lilac are set to live happy lives as siblings. But a stronger relationship awaited them in the long run, both end up happier than ever when each realizes that they have formed a strong romantic affection for the other! However, unbeknownst to the Goat Prince, Lilac hides a dark secret: one which could spell the end of Asriel and Lilac's relationship... and the world as they know it.
  • Learn To LOVE (Sequel to Genocide An Undertale Fanfiction Frisk x Chara) by TheUltimateSinner
    TheUltimateSinner
    • WpView
      Reads 8,980
    • WpPart
      Parts 16
    Frisk had brought Chara to a new run but can they escape the Underground with Chara following behind? Will Chara attempt to kill Frisk or anybody? But most importantly can Frisk teach Chara to feel LOVE and not only feel hate? Finally will they become friends, enemies, or more?
  • Roots of Evil ~ Undertale FF by GoldenCael
    GoldenCael
    • WpView
      Reads 566
    • WpPart
      Parts 5
    Flowey [Serial Murderer], The antagonist of the Underground, might not be the roots of evil. Maybe, someone else is.
  • Sans by Ink-sanz
    Ink-sanz
    • WpView
      Reads 49
    • WpPart
      Parts 2
    'Don't forget'
  • 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
  • Perspectives (an inktale/ errortale story) by Alex__101
    Alex__101
    • WpView
      Reads 2,718
    • WpPart
      Parts 10
    Really crappy fanfic... As Ink and Error argue/fight, Ink eventually finds out what it's like to be one of Error's kind, and Error decides to BRUSH up on some art skills ( bad pun) Will the two of them eventually understand eachother, or will they continuously fight?
  • Undertale Reacts || Truth or Dare, Q&A, Reactions, and More! by theonly_creampuff
    theonly_creampuff
    • WpView
      Reads 1,442
    • 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) !!
  • sans x abused!reader by errortale-fanperson
    errortale-fanperson
    • WpView
      Reads 24,936
    • WpPart
      Parts 5
    tw: blood, gore (old and cringey story)
  • Mettaton x Undyne ......Kinda by SophiaEldenstien
    SophiaEldenstien
    • WpView
      Reads 443
    • WpPart
      Parts 1
    a mettaton x undyne fic. its kinda romantic, but not really. this is a crack ship.
  • Behind the Door (Altertale Soriel) by DorkyWriter17
    DorkyWriter17
    • WpView
      Reads 11,214
    • WpPart
      Parts 4
    • • • In an alternate undertale universe called Altertale, a goat monster attempts to help her younger brother fit in whilst facing conflicts that question her existence. Stressed out, she goes and practices knock knock jokes on a door in the middle of the forest to herself. However, the unexpected happens. Somebody came. • • • ~ Characters do not belong to me but to Friisans on Deviant art and Toby fox~
  • Overstory Chapter 7 and 8 by ReaperPH
    ReaperPH
    • WpView
      Reads 150
    • WpPart
      Parts 26
    Chapter 6 plot: During the time Carter Cross was a vigilante, Alexandra Ember travels to New Home II to search for her sister, Frisk. Meanwhile, Kurayami returns using the body of a young human girl with pink hair as a vessel and Carter Cross attempts to escape a mysterious organization that appears to have abducted him. Chapter 7 plot: Carter Cross escapes the mysterious organization that abducted him. Meanwhile, Linus threatens to erase all of humans unless one of the two species' win in tournament which would decide if both species could co exist by gathering the strongest human and monster warriors from both past and present to represent their species. If humans win, they shall continue to co-exist with monsters, if monsters win, humankind shall be enslaved and monsters will be higher than them.
  • Forced Love (GasterSans x Frisk) by UnknownWaterTonari
    UnknownWaterTonari
    • WpView
      Reads 45,367
    • WpPart
      Parts 17
    Frisk and her parents own a large mansion in a city. When she turns 18 her parents decide that she's now old enough to get married. Her parents are protective but also quite strict, so they decide Frisk should get a organised marriage. Will it work out for Frisk? {All characters and art belongs to their rightful owners}
  • Broken!Inktale by HerLifeisStrange
    HerLifeisStrange
    • WpView
      Reads 254
    • WpPart
      Parts 7
    Ink, hanging in the doodlesphere, notices a big wave of negative energy, confident in his powers, he goes to check it out, first everything seems fine in the AU, but he was playing into Vantablack's and Nightmare's hands, they were waiting for him already.... Ink refused to tell them where the alpha universe was and after some fighting Error, who tried to defend Ink, gets dusted and Ink gets taken to Nightmare's castle. (I tried to describe it without any spoilers! Also this AU belongs to meh)
  • yandere sans oneshots by LillyIsMyOc
    LillyIsMyOc
    • WpView
      Reads 6,395
    • 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
  • Ship Children of my version part 2 by Gomarnic
    Gomarnic
    • WpView
      Reads 1,080
    • WpPart
      Parts 6
    So this is part two of where my ideas of ship children are from. The rules are still the same- Only name the ship and I'll draw. If you want to see my story part 1, then by all means you can go ahead.
  • BironTale: A New UnderTale Fanfiction by NasranSalleh
    NasranSalleh
    • WpView
      Reads 727
    • WpPart
      Parts 37
    Cover art by Simon Kito Old Cover art: https://cs4.pikabu.ru/post_img/2016/06/18/11/og_og_1466274415285726881.jpg .................................................................................................................................................................... It was just like any regular morning, except that Biron had an unusual urge to explore the world more than he usually does. The urge brought him to uncharted heights of Mount Ebott, but he tripped on a vine and fell...to the parallel world known as the Underground. .................................................................................................................................................................... A miracle ensured Biron's survival, but can he find a way back to the surface and see his loved ones? Or will he be punished by the evils that lie beneath the dark realm he found himself in?
  • "Not Quite Determined" Sans x Human/Monster Reader [COMPLETED] by FloweyTheGrouch
    FloweyTheGrouch
    • WpView
      Reads 14,037
    • WpPart
      Parts 50
    You've lived your life without ever knowing your parents. Despite that you dream big because you don't have much; aiming to become a famous singer and prove anyone who has doubted you wrong. Monsters have been freed from the surface. Of course, you happen to meet a certain Skeleton and his joyful brother as well. But will their past continue to haunt them and will it 'hunt' you as well? Will crossing paths with the monsters lead to self discovery? And what happened to the timeline?! You'll just have to read it to find out. (Contains Smut!) This story is based on Toby Fox's game "Undertale". So I don't own anything from this.
  • 𝐃𝐚𝐭𝐢𝐧𝐠 𝐐𝐮𝐨𝐭𝐚𝐬 | ℰ𝓇𝓇ℴ𝓇ℐ𝓃𝓀 by brokenstove
    brokenstove
    • WpView
      Reads 57
    • WpPart
      Parts 3
    A comedy series where Ink and Error go on "dates" across every AU you can imagine - coffee shops, pirate ships, haunted houses, even high school. Error swears it's not romantic. Ink swears it is. The truth? ...Well, that's half the fun. Welcome to 𝐃𝐚𝐭𝐢𝐧𝐠 𝐐𝐮𝐨𝐭𝐚𝐬: a chaotic, banter-filled, fluffy, and very questionable romance where these two break every AU they touch. ★ Episodic crack-romance ☆ Comedy, fluff, rope jokes galore ★ AU requests open!