Undertale Stories

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1.2K Stories

  • Knock Knock - An Altertale Soriel Fanfic by Trash_Goth
    Trash_Goth
    • WpView
      Reads 24,481
    • WpPart
      Parts 28
    It all started with the sound of a knock, And evolved into a joke, The jokes continued until they became friends, And the friendship turned to a relationship, But soon life came into play, The king came along, Thinking he could sweep the love away.
  • Reincarnated as a Voice by IHamTiredAndBored
    IHamTiredAndBored
    • WpView
      Reads 515,877
    • WpPart
      Parts 49
    TW: Swearing and slight gore Y/N reincarnates in the anti-void as a Voice... Will he befriend error or will they make them hate their guts? And will they meet other people? Only time will tell. Hello, this is going to be my first book and idk if it's going to be good so meh :v This story was inspired by transported as a voice by Virus_bOi, I obviously do not own undertale and I don't keep up that much with the fandom, so some personalities might be different, but hey. I can just say that it's a different multiverse ¦ ] The cover image is from Shira Wolfiecute on tumblr
  • He Came to Stay (Blue x Bad Guys) by EmberAshTheFaithful
    EmberAshTheFaithful
    • WpView
      Reads 11,519
    • WpPart
      Parts 13
    Living on a steady diet of caffeine, sugar, and sheer will is not a healthy lifestyle. But how else can you keep up with teammates that need no sleep, no food, and who expect the same of you? Blue has no intention of falling behind, ever, for any reason. But his lifestyle is starting to show to others. What happens when the enemy intervenes for good?
  • A Jaded Emerald [NOT LOOKING FOR ART COMMISSION] by KTama20
    KTama20
    • WpView
      Reads 10,426
    • WpPart
      Parts 33
    Abandoned on Mt. Ebott at the tender age of five, young Harry's unsurprisingly died, but Death's always had a weird relationship with his variant... Meanwhile, before Flowey's revival as souless talking flower, Sans makes a discovery under the mound of snow, Papyrus has always wanted to be a big brother anyways. *Edited Summary (29/09/2025)
  • Male reader X underverse (Revamp) by ItzKiyusei
    ItzKiyusei
    • WpView
      Reads 983
    • WpPart
      Parts 7
    ???: I want a fresh start and you seem like the perfect specimen to use for this story, Y/n L/n. (So in short the first story of this still happened but ???(me) Erased the memories of it happening making it all happen again I hope you guys enjoy this story till next time.)
  • A Skeleton Amongst Us by Nikki_7842
    Nikki_7842
    • WpView
      Reads 477
    • WpPart
      Parts 7
    Sans and the gang escape the underground but the world outside doesn't accept them. They have to disguise themselves. Inspired by the glamours In A Wolf Amongst Us. Multiple Relationships, drama, romance, angst, despair, adventure and craziness ensues.
  • how the bad sanses accidentally adopted a parasite ( Y/N version ) by Andy_the_badSans_fan
    Andy_the_badSans_fan
    • WpView
      Reads 3,534
    • WpPart
      Parts 16
    This isn't a normal Y/N story the bad sanses do a raid on an illegal auction of many rare, dangerous, and illegal things. but after the dust settles, killer finds what he believes to be a weird mutated cat and decides to take it back with him art by me. my first book, and feel free to correct my spelling in the comments Y/n means your name Y/fc means your favourite colour Y/fm means your favourite type of meat Y/hl means hair length Y/hc means hair colour Y/sc means skin colour Y/ec means you're eye colour
  • reborn as killer sans oh this will be fu- wait were mentally unstable  by Moonwolf_230
    Moonwolf_230
    • WpView
      Reads 15,011
    • WpPart
      Parts 39
    so I oh ways want to make a reborn as killer sans, but we're mentally unstable, of course, due to the rest and our past memories, which we can't remember what we were anyway! We know everything and everyone, so why not mess with them. This going to me fun!!!
  • Dreamtale Oneshots by TeardropBlue
    TeardropBlue
    • WpView
      Reads 175,935
    • WpPart
      Parts 92
    Dreamtale Oneshots that gradually turn into a story by the end! Featuring Dream, Nightmare, Ink, Blueberry and Error! And Bonnie the Bunny (not to be confused with FNaF (even though I inserted him as a FNaF reference (everyone got attached to him))). No ships, though some subtly hinted at such as errormare :> None are made canon! Dreamtale belongs to Jokublog Error belongs to CrayonQueen Ink belongs to Comyet Blueberry belongs to fandom, Underswap belongs to P0pcornPr1nce
  • Stone Cold Love (Faery Reader X Nightmare Sans) by ShadowAssassin4
    ShadowAssassin4
    • WpView
      Reads 7
    • WpPart
      Parts 4
    Basically the reader is faery that likes to rage bait Nightmare. I loved the concept of this evil king that loved killing people, was stuck with an annoying ass faery and he can't kill them because of an old promise. The first few chapters are basically backstory to try and set up the story and to have some crumbs of lore for anyone that knows the original story of Dreamtale.This book wouldn't let me list any other characters but Dream and the other Sanses are definitely involved.
  • Blueberries and Blackberries (NightBerry One Shots) by TheKingNormally_123
    TheKingNormally_123
    • WpView
      Reads 996
    • WpPart
      Parts 19
    these are NightBerry one shots so I hope y'all that read this enjoy (: I am taking requests for one shot, look at Not A One Shot for info
  • 𝐃𝐄𝐀𝐃 𝐓𝐎 𝐌𝐄   kris deltarune  by webkas
    webkas
    • WpView
      Reads 8,680
    • WpPart
      Parts 10
    𝗗𝗘𝗔𝗗 𝗧𝗢 𝗠𝗘 ⏤⏤⏤ #01 " you're dead to me "
  • The Copy Anomaly by Cyn-number1goober
    Cyn-number1goober
    • WpView
      Reads 705
    • WpPart
      Parts 5
    Adam was just a normal 19 year old, but after he was sucked through a red star-shaped portal, his world got a whole lot bigger. watch as Adam meets new friends and deals with his own inner turmoil that both is and is not his. (I own none of the characters here except for Adam, all other characters belong to their original creators. the grammar might be bad, and might be a little cringe or not, I don't know, this is my first fan-fic.
  • Marked in Red, Claimed in Gold (Mafiafell Sans x Reader) by clubofsnakes
    clubofsnakes
    • WpView
      Reads 719
    • WpPart
      Parts 15
    The skeleton shakes his head slightly, a boney hand sliding across his skull. "Ah- well- that wasn't free Doll, 'course you'll have to pay me for that..." He trails off, his cocky smirk ever present on his face as he looks you up and down for a mere second, "...little favor." He pinches his pointer finger and thumb together before rubbing them together. _____________________________________ (Y/N) is a bartender that was kept secret from the after hours patrons at the bar she worked at for two years. Her boss not wanting her to associate with the people that would further pull her into a world that she was scratching the surface of just by working there. But after staying just a few minutes later then she was supposed to she stands face to face with a gold toothed smartass with a devilish smirk- his red eyes trained on her every move. ______________________________________ There is cussing but let's be honest- there's cussing everywhere. Also posted on AO3 as clubofsnakes where additional chapters later on will appear there and not here. I was inspired by- @MissHoll-E-Socks with their story "Can I take you to dinner?" NONE of the art is mine.
  • Pizza Tower: Pepperman x Female Human Reader(On Hold). by RACHELSSECONDFIRE210
    RACHELSSECONDFIRE210
    • WpView
      Reads 19,052
    • WpPart
      Parts 48
    When Y/n enters an art gallery competition in hopes of earning enough money to buy her own house, she meets fellow opponent Pepperman, a talking pepper, who only wants to earn first place to fuel his own narcissistic ego, which annoys Y/n at first. But when a fight breaks out between Y/n and Pepperman on the day of the art gallery competition, their relationship is put to the test when they become sworn enemies. This takes place after the events of Pizza Tower, 4 years after the tower collapses. ❌❌No RP's on this story.❌❌ Character's in the story. Y/n. Pepperman. Peppino. Gustavo. Brick. Vigert. Noise. Noisette. Tobias. Fake Peppino. Pizzaface. Pizzahead. Gerome. Mr Stick. Crossover character's in the story. Muppet/GIGA Kris - Deltarune The Other Puppet AU. Junkil/Junkil Redux - Deltarune Chapter Rewritten AU. Serial Designation N - Murder Drones. Fang, Bean, and Bark - Sonic The Hedgehog. Jewel Ghoul - Antonblast. Bossbusters - Antonblast. Fellsta/Fellswap Napstaton - Fellswap AU. Swapsta/Swapfell Napstaton - Swapfell AU. Mettaton(Before The Hunger), And Mettaton(After The Hunger) - Axetale AU.
  • Bluu stuff (General stuff) by KongeegamingYT
    KongeegamingYT
    • WpView
      Reads 557
    • WpPart
      Parts 33
    A book to share my art, thoughts, random moments in my life, OCs, and other general (or should I say, BLUU) Stuff.
  • One Happy ending by Firehedgehog
    Firehedgehog
    • WpView
      Reads 53
    • WpPart
      Parts 2
    They'd been seeking a happy ending a long time, life after life. they couldn't remember the start, just that when they died there was the voice and the never ending mist. Murder, Betrayal.. sometimes just the wrong spot at the wrong time. How many lives, how many faces... it was hard to keep track.. Happy Ending... are a lie Can someone save them
  • ChillTale by ralasael
    ralasael
    • WpView
      Reads 10
    • WpPart
      Parts 4
    Imagine all of harm thing's in undertale, do not exist? This au will be place in a timeline that attacking or other harmfull thing is not exist.
  • Strings of the Destroyer by Palito266
    Palito266
    • WpView
      Reads 36
    • WpPart
      Parts 16
    Dread ate at poor Sans as he tried to find its source. Multiple stories spoke of a fallen monster whose tears were woven like strings, prophesized by dread. Before he knew it, Error raptured him, all in the objective to show just how wrong he was about humanity. Refusing to yield, it was now Sans's task to defy his captor not in a physical brawl, but in a philosophical engagement. Note: This work will be updated every 2 days until the first arc is complete. Note 2: This is a rework of a previous story titled "Tales of Infinity." You do not need to read that to understand this one, and I don't recommend you do so as it's not "up-to-par" in terms of quality. Note 3: The cover art was edited by me, although the original art was made by "InsanityCreator." (https://www.deviantart.com/insanitycreator/art/Error-and-Blueberry-830981708) Credits to them.
  • Random stories//oneshots I guess// idk by Stat1c489
    Stat1c489
    • WpView
      Reads 13
    • WpPart
      Parts 3
    Yo so these are just like random stories I make sometimes normally multifandoms and my ocs doing random stuff so uh yea I just wanted to post these for funsies