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Undertale Stories

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1.2K Stories

  • He Came to Stay (Blue x Bad Guys) by EmberAshTheFaithful
    EmberAshTheFaithful
    • WpView
      Reads 11,795
    • 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?
  • Reincarnated as a Voice by IHamTiredAndBored
    IHamTiredAndBored
    • WpView
      Reads 521,076
    • 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
  • A Killer Time by SpiritWolfNura
    SpiritWolfNura
    • WpView
      Reads 5,867
    • WpPart
      Parts 24
    Killer always knew he would burn in Hell. All the sins he committed. All the death that came with every step he took. Killer was out looking for something new, while Nightmare wasn't around to fix his unstable soul. He meets three little red bastards and their big bad wolf. "eh, you kill, i kill. what's the worst that could happen?"
  • I'm...swap gaster? by KarmaAkabane425
    KarmaAkabane425
    • WpView
      Reads 72,101
    • WpPart
      Parts 22
    Yeah sorry gained an idea on if someone became swap Gaster Also they may be apathetic or just confused on their feelings and MAYBE Autistic, I may be a bit wrong on apathetic or not completely accurate idk yet And it's a huge maybe on the autistic part it might be mentioned at some point or not I usually don't do this kind of story on something like using apathetic and perhaps autistic but i decided I wanted to try. And the maybe confused kind feelings is not knowing what they feel or if they even feel anything and all
  • Burning ~ Undertale Grillby X OC by Gaysm8
    Gaysm8
    • WpView
      Reads 754
    • WpPart
      Parts 11
    "Don't judge a book by its cover, doll." Medusa wasn't really the most liked monster in Snowdin, though she didn't particularly care. When Frisk begins yet another run, they are introduced for the first time. While being stereotyped, she goes to one flame haired man to talk to.
  • Reborn as Dream Sans [Undertale Multiverse] by DeadEnDead
    DeadEnDead
    • WpView
      Reads 87,945
    • WpPart
      Parts 62
    Reborn as the guardian of positivity, you find yourself in a strange new world, uncertain of what it may hold. Navigating it isn't easy with gods like Nightmare and Error trying to strike you down every step of the way. But unlike the previous Dream, you have nothing to lose, and are determined to forge a better path than the soul whom you have replaced. Cover art by the wonderful @Nymara379 on A03 ♡
  • L - O - V - E   (Sans X Reader)   * ON HOLD * by exoticsepticeye
    exoticsepticeye
    • WpView
      Reads 6,325
    • WpPart
      Parts 20
    One day, Y/N was playing Undertale. Y/N finished the game, both genocide and pacifist. After the second pacifist ending, you wondered how life would be like IF the monsters actually were real. If the monsters would actually roam around and act as humans. That thought soon changed. ( Book Cover Picture is NOT Mine. I found it on google. Credits to the owner. )
  • Beware the Izuku that speaks in hands by Technoblade1681
    Technoblade1681
    • WpView
      Reads 6,759
    • WpPart
      Parts 22
    Same description as first story Izuku yagi neglected and bullied becomes W.D Gaster and Uses Science to Make his sons Sans and Papyrus
  • Tiny dancer Dancetale Sans x reader (COMPLETED) by Kath1908
    Kath1908
    • WpView
      Reads 5,508
    • WpPart
      Parts 17
    4 years after monsters came about Ebbot (Y/N) was friends with the Dreemurr children. Being the master dancer that she is can gather her magic to do amazing things. Having been through a lot in the short 19 years of life. She finally meets a handsome monster who knows her big brother and who understands what she goes through. What will happen between these two?
  • Sans AU x Reader One-Shots by AestheticallyCha0tic
    AestheticallyCha0tic
    • WpView
      Reads 2,422
    • WpPart
      Parts 8
    There will be one-shots, scenarios, or whatever I feel like writing! None of these stories are connected in any way (unless specified)! They're all just random scenarios for fun! The reader is written to have no specific gender; pronouns are they/them, unless DIRECTLY specified in the notes before the chapter/fic <3 _______________ I mainly write fluff, but sometimes, SOMETIMES, I write with darker themes. While I'm not 100% sure what I'll post here, there's a chance that any of these may show up: Kidnapping Stalking Character Death Drugging Yandere Smut If any of these make you uncomfortable, I would not recommend reading this. However, I will try to add any necessary warnings at the beginning of each story/addition. Stay safe, and prioritize your mental health <3 _______________ Any story suggestions are appreciated! I can't promise I'll ALWAYS write about them, but I will definitely use them for inspiration. :D God I hope this fandom isn't dead :')
  • The Unwanted Child (Male Reader x Undertale) by DEVANGABRIELLE
    DEVANGABRIELLE
    • WpView
      Reads 946
    • WpPart
      Parts 4
    Born into a world that decided his fate before he even took his first breath, Ryomen Y/N was never given a chance to be human. Feared by his own mother. Hated by his village. Rejected by humanity itself. They called him a curse. So he became one. With nothing left but silence and resentment, Y/N abandons the human world and falls into the Underground-a place filled with monsters who fear the surface just as much as he despises it. But the Underground is not what he expected. Monsters do not see him as human. They see him as something far worse. And within the depths of this strange world, he meets a wandering ghost named -a soul bound to the past, carrying hatred and emptiness similar to his own. At first, they are nothing alike but conflict and silence. Yet as their paths continue to intertwine, something begins to shift. Two broken souls. Two histories of rejection. Two beings the world tried to erase. And in a place where mercy and determination decide fate itself, Y/N must confront a terrifying truth: Maybe the real monsters... were never in the Underground.
  • Fresh New Antivirus by Hidden-Ajinn
    Hidden-Ajinn
    • WpView
      Reads 288,420
    • WpPart
      Parts 98
    Fresh is Admin of the Multiverse!? This can't end well ... or can it? This is an alternate universe - er, multiverse - where Fresh is responsible for the monitoring and disciplining of Players and Hackers as well as hunting down and eradicating any virus or external threat to the multiverses balance systems. Now what's this about some unrad lady called Fate? Welcome to Admin Fresh Verse (AFV for short i guess lol) *** FGoD concept by Harrash6 Characters belong to their respective owners Undertale by Toby Fox **** How the FRESH did i manage #1 in fgod !? Now 1nd in fresh !?! i ... i'm gonna sit down
  • Error/Moxxie Drabble and Request 2 by Nightstar246
    Nightstar246
    • WpView
      Reads 10,376
    • WpPart
      Parts 34
    A continuation request book from the Error/Moxxie Random Drabble book! From request to mine own ideas mix in! Book cover art not mine belong to their original owner.
  • UnderPunch (One Punch Man x Undertale) by NOTATAKENNAME
    NOTATAKENNAME
    • WpView
      Reads 550
    • WpPart
      Parts 37
    In this AU, Undertale monsters live amongst humans in the One Punch Man verse. How will it all play out? (THIS IS DIFFERENT THAN PUNCHTALE!!!) As an AU, characters may differ from their canon counterparts.
  • Darkness' Eternal Bride (Gaster x Reader) by xsfolia
    xsfolia
    • WpView
      Reads 35,274
    • WpPart
      Parts 34
    WARNING: THIS CONTAINS HIGHLY MATURE CONTENT (BLOOD, VIOLENCE) READ AT YOUR OWN RISK Money can change a lot of things. It can even change your destiny. Plunge yourself into a life of romance, science, disappearance and misunderstanding. ________________ "When you get better, I'd like to kiss you" ... Gaster only wanted to conduct an experiment. He surely didn't want his life to be taken over by weird feelings. He also wanted the only thing he couldn't really have. He wanted you. What will he obtain? Will his research finally be completed? Or will he have to start another one? As for you, will you be able to move on from the past? Words count: 81.390 Also contains mentions of nsfw [Rankings: #1 in #gaster (08/21/2022), #5 in #xreader (08/21/2022)]
  • [Natural Hope In A New World] by RuneNovaXD
    RuneNovaXD
    • WpView
      Reads 6,473
    • WpPart
      Parts 11
    A new hope has awakened in the world of RWBY Y/n a normal boy is Isekai'd into the fictional world of RWBY and is determined to rewrite fate, How will he change the story I got no clue, how bout you? All RWBY characters are owned by rooster teeth And all other characters are owned by their respective owner's [Slightly Slow Uploads]
  • So Many Universes, So Many Possibilities by PinkHorsePro
    PinkHorsePro
    • WpView
      Reads 71,450
    • WpPart
      Parts 29
    After falling into the void, Erratum lands in a different multiverse. He saves two little babybones from the clutches of Gaster, and meets the new multiverse who will do everything to fight for him. Or... at least that's how the original goes. In another version he instead falls again, freaked out seeing Ink, getting sent with his kids to other universes. Which already opens up so many choices But there is two wonderful words to explore, the cause of many ideas, stories, worlds, and other huge events. What if? What if Erratum had bent sent to a different place before finding Null and Void? What if Erratum wasn't Erratum, but another forced destroyer of Fate's work? What if all of them were sent to the same multiverse together? Hell, what if it wasn't Error, but a forced god Ink? So many what ifs... but that is the main reason universes exist. With so many universes, comes so many possibilities. This is based off Harris6's Falling Into A Different Destiny and their concept of Forced Destroyer. Please, if you haven't seen any of their books do go check them out. It is definitely worth it. I do not own anything except for the OC's I include, and some worlds. Please be aware that this book will get dark and have many trigger warnings. The art belongs to me! Not amazing but I don't draw skeletons a lot and apparently the style I went for didn't work the best- Also this use to be a full blown book, but it's been changed into oneshots. All of the chapters before will be marked as old- Enjoy!
  • My Art Book (The Third) by DiceyKing69
    DiceyKing69
    • WpView
      Reads 14,714
    • WpPart
      Parts 182
    My other art books are full, so here's a new one! The third! I wanna share my tumblr art with you guys <3 I add 3 new chapters at a time. Not everyday updates, just whenever. ENJOY!!!
  • Punchtale by NOTATAKENNAME
    NOTATAKENNAME
    • WpView
      Reads 2,138
    • WpPart
      Parts 27
    Saitama gets stuck in the Underground. Well, this'll be interesting!
  • Glitchtale ATF (After The Future) by WingDingWhite
    WingDingWhite
    • WpView
      Reads 1,043
    • WpPart
      Parts 126
    The future of this timeline DISCLAMER All the main characters belong to Camila Cuevas. THE ADDITIONAL CHARACTERS ARE MY CREATION to give my idea on the future of Glitchtale having said that I hope you like it if so I invite you to follow me and leave a positive feedback ;3