Undertale Stories

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1.2K Stories

  • Reincarnated as a Voice by IHamTiredAndBored
    IHamTiredAndBored
    • WpView
      Reads 513,556
    • 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
  • how the bad sanses accidentally adopted a parasite ( Y/N version ) by Andy_the_badSans_fan
    Andy_the_badSans_fan
    • WpView
      Reads 3,273
    • 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
  • Meme Book - Pictures and Comics by IrainandthunderI
    IrainandthunderI
    • WpView
      Reads 24,233
    • WpPart
      Parts 96
    I have too many memes so here
    +19 more
  • Punchtale by NOTATAKENNAME
    NOTATAKENNAME
    • WpView
      Reads 1,359
    • WpPart
      Parts 19
    Saitama gets stuck in the Underground. Well, this'll be interesting!
  • Unbecoming of a KILLER (becoming Killer Sans) by Dedicated2Sleeping
    Dedicated2Sleeping
    • WpView
      Reads 479
    • WpPart
      Parts 5
    [no ships rn] Killer Sans never had a choice from the beginning. Passed on from one to another, from Chara to Nightmare. Out of a frying pan and into the fire.. Honestly, you're speechless by his backstory. It's too tragic! Hes a bit too miserable for your liking. Though, reading the good ending for him made you felt somewhat better. Watching Killer and Color Sans rebelling against Nightmare was satisfying after seeing Killer get utterly destroyed by him in the previous comics. If you had to rate Sanses on which one you never want to be, Killer Sans would be at the top. After all, he hallucinates, hes mentally unstable, emotionless most of the time, usually slaving away for his boss and the whole 9 yards about his backstory. Unfortunately, you look at the knife in your hand and the dusty Snowdin then at the two souls beside you. Killer and Chara both arguing, the overwhelming voices around you made it unbearable already. [thought of on 8th March 2026]
  • MoreTale+ / 🇺🇸 English version! by Vik_XPY
    Vik_XPY
    • WpView
      Reads 96
    • WpPart
      Parts 9
    Not every story has a happy ending. Some... are forgotten before they even end. Abandoned characters. Incomplete worlds. Destinies that never reached their conclusion. But... what if there were a place where all of this could continue? Legend has it that there are two apples: the Apple of Positivity... and the Apple of Negativity. Two opposing forces. Two fates already known. But no one speaks of the third. The one that should never have existed. In a refuge hidden between universes, where not even the guardians can see... broken stories find a new home. Or remain trapped... between what they were... and what they never came to be. An original AU inspired by Undertale, where even the forgotten can still change everything.
  • Undertale: Becoming Dust by Dedicated2Sleeping
    Dedicated2Sleeping
    • WpView
      Reads 8,233
    • WpPart
      Parts 17
    Have you ever thought about what it would be like to be.. Sans? Be Papyrus' lazy and playful brother? Be a comedian with endless jokes? Be the mysterious judge? Be well-liked? You envy him. You wanted to be him. Yet nothing could've prepared you for what's coming. . . . (WARNING, THIS IS A MIX OF CANON AND FANON FACTS. THERE MIGHT BE THINGS YOU DONT LIKE BUT JUST BE THE BIGGER PERSON AND TOLERATE IT. THIS IS NOT MEANT TO BE TAKEN TOO SERIOUSLY AND IS INTENDED ONLY FOR ENTERTAINMENT.) (Cover made by me. As you can see, I made that thing on IbisPaint. I understood nothing about making book covers and I messed up on the proportion many times so I gave up and that's how the cover came to be. Idk how to shade and make backgrounds/landscapes btw) (Tbh I wished I made this far earlier because it's late 2025, no one is going to read this pile of nonsense. 😭) YOU GUYS HAVE AN OPTION TO CHOOSE THE DIRECTION OF THIS STORY THROUGH FREQUENT POLLS I MADE!!! First thought of and made on 1st Dec 2025 Posted on 6nd Dec 2025 cuz I was feeling confident for that hour. I can proudly say I've been doing this book since last year hahhahahahahahaha (get it cuz I did this thing is Dec 2025 and now is Jan 2026?) I made the cover btw
  • Welcome to the Future  by SpiritWolfNura
    SpiritWolfNura
    • WpView
      Reads 28,526
    • WpPart
      Parts 42
    For 130+ years, monsters have been extinct with the only things left behind having been their hybrid children. Over the years as the hybrids continued to reproduce and 80% of the world's population went from human to superhuman. With the rise of superhumans came the rise of heroes and villains. AU High. Japan's #1 hero school. A place that produces Japan's finest heroes. A place that hides that last of monsterkind.
  • dont leave me (young overpower reader x female chara) by Luciferuf
    Luciferuf
    • WpView
      Reads 3,278
    • WpPart
      Parts 16
    y/n, a young boy, is friend with char, a little girl bullied for her red eyes. one day she dissapear and y/n fell in depression. when she reappear death y/n try to get over her body but everyone stop him. that makes him crazy and go to a killing spree.
  • Evolution of a Reincarnation  by Lunazul3000
    Lunazul3000
    • WpView
      Reads 46,036
    • WpPart
      Parts 39
    I survived, then lost.* I lived and loved.* I lost, but won.* I survived and loved.* I lost, but survived.* I lived, but was lost.* Can I find myself again? I was reborn as Prime Undertale Sans, but this universe's version is a bit different. I had finally managed to get my happy ending. But, with the introduction of a PLAYER, things start to fall apart. Can I make it through the hurtles my new path will bring? Why did I have to become a Geno? Is that Fate? Ugh, guess I'm Error now. Where's Reaper when I need a cuddle? Hit 3 in #forcedgod 3 in #genosans 9/16/22 6 in #reapertale 10/29/22 5 in #geno 9/15/22 1 in #crosssans 9/11/22 2 in #errorsans 9/20/22 2 in #sans 9/20/22 2 in #inksans 9/20/22 1 in # nightmaresans 9/22/22 1 in #dreamsans 10/2/22 1 in #undertale 9/28/22 !!!!!!!! 5 in #blueberrysans 7 in #reapersans 12/2/22 3 in #fgod 12/2/22 1 in #DestructiveDeath 12/2/22 Check out my other books! May contain mature language, violence, torture, sexual, self-harm, and suicidal content. May not be suitable for all viewers. Inspired by harrish6, pastagod_italy, nellie sheerin, and Firehedgehog. I do not own Undertale, Reapertale, or Dreamtale. All non-oc characters belong to their respective creators.
  • Murder!Humantale: Sophia's Story by Emerald-3312
    Emerald-3312
    • WpView
      Reads 142
    • WpPart
      Parts 7
    An experimental fic I have featuring my own Undertale AU, Humantale, may or may not continue it. (Credit to the cover goes to xchocokills on Pinterest.)
  • CAZZY AS DAISY'S!!! by Moonwolf_230
    Moonwolf_230
    • WpView
      Reads 1,119
    • WpPart
      Parts 13
    You are reborn as errors..... But you are crazy teenagers who will pretty much make a lot of mistakes. You mess around with the star and even the bad sans. You call yourself a alone wolf, but you end up getting brother's some how in the end that will raise you how to act right and responsible for your role. Whichs suck because you want to have fun. And fate is mean, but she finally found an error sans that will do its job without complaining, but he or she is annoying, and like costing her trouble! But she can't help but to be an aunt for newborn error. How did you become errors sans? Well, you were playing undertale, and you oh ways like to do genocidal all the time. But you wonder what was sans view of your wrong doing. So you stopped doing genocidal feelings, and it was wrong later. Unilt you joke being errors sans bit And magical die from saying that. But you're not only one who calls Error sans some of your brother too
  • the Great Hero Papyrus by Sansy-346
    Sansy-346
    • WpView
      Reads 7,035
    • WpPart
      Parts 17
    "After countless resets, Papyrus has his role down to a science. But everything changes when he's thrust onto a strange new stage: the Surface. In a world where humanity wields 'Quirks,' Papyrus befriends a young Izuku Midoriya and sets his sights on a new goal. By becoming a top Pro Hero, Papyrus hopes to finally secure a future for his brother and all of monsterkind." Ps. I want to give you all a little announcement a good friend of mine you all know dreadwing346 on fanfiction.net and here on wattpad is helping me to write this story and we both agreed to put this story on a different fansite known as Ao3 under the username Dreadwing.
  • Chara X Sans ONESHOT - "Put Your Head on My Shoulder" by Red_scarfed_person
    Red_scarfed_person
    • WpView
      Reads 36
    • WpPart
      Parts 1
    Art is NOT MINE!! Made by @randomomlette on Reddit! https://www.reddit.com/user/randomOmellette/ There was a good side of life, he felt. Although his brother had died once more, along with the rest of his livelihood. But... at least he got days worth of deadly revenge, as well as his chance to see the woman he loved. Find me on Tumblr @kusagrasskusa Find me on Ao3 @AnotherBloodyMaryOnACross Thank you lovelies!
  • Reset: Going back to the past with changes by RageRevan
    RageRevan
    • WpView
      Reads 530,146
    • WpPart
      Parts 76
    Inspired by my evil dragon storyline from Tales of the dark Universe as well as Issei Dxd, the story takes place after the evil dragon war, Issei finally wakes up from coma and realizes that none of the girls decided to take their time to visit him or Asia who was in comatose, the only people that visited him were his parents and his sensei Azazel. Things only become worse when he finds out that Rias is not only responsible for his death at the hands of Raynare but also proceeds to cheat on him with another man with the rest of her peerage along with demeaning him Having enough of the insults and betrayals, he runs away but suffers from dragon's fall, he is then followed by the people who genuinely cared for him as well as the only woman who truly loved him, they were there for him at their final moments, but it turns out two specific entities decide to take interest in him, Issei then decides along with Draigg and the two specific entities that he is not going to be ever manipulated or toyed with ever again in the new timeline, he then proceeds to perform a reset with only the people present with him keeping the memories of the previous timeline High School Dxd belongs to Ishibhumi Undertale belongs to Toby Fox Rankings: #1 in highschooldxd on 03/04/2022 #1 in issei on 06/04/2022 #1 in Raynare on 07/04/2022 #1 in Akeno on 09/04/2022 #1 in Frisk on 12/04/2022 #1 in Reset on 24/04/2022 #1 in Chara on 1/06/2022 #1 in Azazel on 7/02/2023
  • how the bad sanses accidentally adopted an parasite  by Andy_the_badSans_fan
    Andy_the_badSans_fan
    • WpView
      Reads 3,561
    • WpPart
      Parts 20
    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
  • Judge's Wrath by Cocobr0
    Cocobr0
    • WpView
      Reads 417
    • WpPart
      Parts 7
    Sans. The weakest, yet the hardest boss to beat in undertale. At first glance, he seemed like nothing but a comedic, lazy skeleton. But if you push far enough, if you decide to take the genocide route... He will show you HELL. Now imagine him free from the game's restriction. Disclaimer : I do not own any art i use in this story or any characters here. Undertale is owned by Toby fox.
  • He Came to Stay (Blue x Bad Guys) by EmberAshTheFaithful
    EmberAshTheFaithful
    • WpView
      Reads 11,263
    • WpPart
      Parts 12
    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?
  • SOULmates Across Worlds by xHowToLoveADragonx
    xHowToLoveADragonx
    • WpView
      Reads 690
    • WpPart
      Parts 10
    You were just walking home. A tear in reality split open underneath your feet and suddenly you were falling. Falling Falling Then you fell up and onto the tiled floor of a basement lab. Now all of a sudden you're in another world and surrounded by 6 strange skeletons (plus one's brother). Being terrified of all things horror and monsters, what are you to do? *Will contain mature themes but no smut*
  • A Jaded Emerald [NOT LOOKING FOR ART COMMISSION] by KTama20
    KTama20
    • WpView
      Reads 9,694
    • WpPart
      Parts 31
    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)