Undertale Stories

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1.2K Stories

  • Darkness Is Nicer Than It Seems (Nightmare Sans x Reader) by Lollipopswirl99
    Lollipopswirl99
    • WpView
      Reads 145,597
    • WpPart
      Parts 27
    (Y/N) had a regular life. A normal job, home, everything. Sure she had her own problems like insomnia, nightmares, and no friends but that wasn't anything to special. Though all of that would change when she finally decides to go over to that very special Gold and Dark tree.
  • Reincarnated as a Voice by IHamTiredAndBored
    IHamTiredAndBored
    • WpView
      Reads 513,966
    • 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
  • Meme Book - Pictures and Comics by IrainandthunderI
    IrainandthunderI
    • WpView
      Reads 24,238
    • WpPart
      Parts 96
    I have too many memes so here
  • Punchtale by NOTATAKENNAME
    NOTATAKENNAME
    • WpView
      Reads 1,434
    • WpPart
      Parts 22
    Saitama gets stuck in the Underground. Well, this'll be interesting!
  • Blueberries and Blackberries (NightBerry One Shots) by TheKingNormally_123
    TheKingNormally_123
    • WpView
      Reads 993
    • 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
  • how the bad sanses accidentally adopted a parasite ( Y/N version ) by Andy_the_badSans_fan
    Andy_the_badSans_fan
    • WpView
      Reads 3,348
    • 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
  • Undertale: Becoming Dust by Dedicated2Sleeping
    Dedicated2Sleeping
    • WpView
      Reads 8,308
    • 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
  • Unbecoming of a KILLER (becoming Killer Sans) by Dedicated2Sleeping
    Dedicated2Sleeping
    • WpView
      Reads 520
    • 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.
  • Evolution of a Reincarnation  by Lunazul3000
    Lunazul3000
    • WpView
      Reads 46,116
    • 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.
  • the Great Hero Papyrus by Sansy-346
    Sansy-346
    • WpView
      Reads 7,044
    • 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.
  • NightKiller oneshot (request back open) by Cl0uds1nth3sky
    Cl0uds1nth3sky
    • WpView
      Reads 61,354
    • WpPart
      Parts 191
    Yes(art not mine) (All characters mentioned in these one shots are not mine)
  • Dreamtale Oneshots by TeardropBlue
    TeardropBlue
    • WpView
      Reads 175,562
    • WpPart
      Parts 89
    A book of Dreamtale oneshots I started writing in 2017 that gradually turned into an actual story by 2020. The writing isn't great at first but I assure you as the oneshots progress you will see improvement :) These are not Dreammare and no ships are made canon, however some are subtly hinted at such as Errormare. You can choose to see them as platonic or romantic.
  • WisteriaTale by x_sunshinelight_x
    x_sunshinelight_x
    • WpView
      Reads 3,661
    • WpPart
      Parts 17
    This Au start with a skeleton who has a special hidden magic that no other monsters in his Au have ever seen he named himself as "Sans" but in other sanses from the different Au calls him "Wisteria" Wisteria is the only monster that has special hidden magic but his plant manipulation is very special to him on his Au all monsters in WisteriaTale can create and grow different kinds of plants but, Sans is different instead of creating different kinds of plants he can only grow 1 different kind of plant which is a "Wisteria Tree" that glows brightly when there is no light. But Wisteria doesn't know that his life got changed when he sees something strange inside the ruins. Then Wisteria realized that he could hear his CREATOR'S voice guiding him for his next adventure and journey to learn more about the different kinds of AU's that existed. *CHARACTERS* WisteriaTale characters- Sunshinelight (me) Original! Sans- Toby Fox Alpha! Sans- SHADIKAL15 Error! Sans and Geno! Sans- loverofopiggies / Crayon Queen Horror! Sans- Sour Apple Studios Dust/ Murder Sans- Ask-dusttale Killer! Sans- Rahafwabas Dreamtale Brothers- Jokublog Ink! Sans- Comyet Darrien and nameless kid- Nazmaki / nanazfruit395 and other versions of sanses
  • let's try(hazbin hotel x male reader) by MelissaKiser5
    MelissaKiser5
    • WpView
      Reads 1,663
    • WpPart
      Parts 36
    I'm gonna try again this is sans in the hazbin hotel another thing I don't own not a damn thing in this story besides the story itself
  • Welcome to the Future  by SpiritWolfNura
    SpiritWolfNura
    • WpView
      Reads 28,549
    • 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.
  • He Came to Stay (Blue x Bad Guys) by EmberAshTheFaithful
    EmberAshTheFaithful
    • WpView
      Reads 11,293
    • 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?
  • Pizza Tower: Pepperman x Female Human Reader(On Hold). by RACHELSSECONDFIRE210
    RACHELSSECONDFIRE210
    • WpView
      Reads 19,039
    • 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.
  • 𝙲𝚈𝙲𝙻𝙴 | Various x reader by SpringborN8
    SpringborN8
    • WpView
      Reads 486
    • WpPart
      Parts 15
    𝙳𝚘 𝚢𝚘𝚞 𝚠𝚊𝚗𝚝 𝚝𝚘 𝚋𝚎 𝚕𝚘𝚟𝚎𝚍? 𝙶𝚛𝚎𝚊𝚝. 𝙸'𝚕𝚕 𝚐𝚒𝚟𝚎 𝚢𝚘𝚞 𝚝𝚑𝚊𝚝. | This is a multi-fandom x reader story. I don't think I'll update it very often, but I'll try. For those curious about the plot, I can briefly explain it like this: You're an average person, and you like being one. You planned to finish high school, become a simple translator, live with your family, and enjoy the simple happiness you have. So when you find yourself in every story you know and don't know, and everyone starts following you like a puppy, you find yourself completely lost. I would like to add more tags, but unfortunately I can't.
  • 🎵I dance to forget 🎵 by the_emergency_food
    the_emergency_food
    • WpView
      Reads 349
    • WpPart
      Parts 3
    A dancer doll who dances in the dark by force, but she doesn't care anymore. She dances and dances while others watch with love and obsession. Some say love only grows when the person is passionate or desperate for the other person and they will show that it is their meaning, just in every different ways. This is the rewrite version of past version and the photo I will use are not mine, they belong to their original creator.