Undertaleau Stories

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1.2K Stories

  • Never Alone (Sans x depressed!abused!magical!hybrid!reader) by Stary_Lunamoon
    Stary_Lunamoon
    • WpView
      Reads 6,127
    • WpPart
      Parts 64
    All art in this story isn't mine unless I say so. Has possibly mature words and violent content, if you don't like that then please read something else! This is a story about what happens after (Y/N)'s search for her lost adopted sister Flora who disappeared in the middle of the night after having a horrible nightmare. The only clue (Y/N) had of where Flora might be was a strange note. This is my first story please DO NOT JUDGE it. It will most likely have AU's. I might add parts from other fan-fic (Quotev and Wattpad) so please expect that. I hope you enjoy!
  • Reincarnated as a Voice by IHamTiredAndBored
    IHamTiredAndBored
    • WpView
      Reads 494,238
    • WpPart
      Parts 48
    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
  • Powdered Floors by PonchoBow
    PonchoBow
    • WpView
      Reads 453
    • WpPart
      Parts 3
    A story where a pregnant woman dies a tragic death and is given a second chance in the form of waking up at one DustTale Sans, luckily, someone answered her prayers and she isn't alone. This is her chance to start anew, a chance to heal, with her baby. [[ Possible TW(s): Abuse, Abusive relationships, baby death (temporarily). More to possibly be added later. ]] I do not own Dust Sans or any of the characters here except for the oc.
  • Sans Odinson VS Nightmare Sans by BL24G_Asgartale
    BL24G_Asgartale
    • WpView
      Reads 9
    • WpPart
      Parts 1
    In the dead of night in Asgard, the Godslayer Sans Odinson-tyrant of Asgartale, slayer of gods, wielder of Mjölnir and thunder-faces his most dangerous intruder yet. Nightmare Sans, the King of Negativity from Dreamtale, hungers for the endless darkness pouring from Odinson's soul. LV sky-high, thunder roaring, Fenrir Blasters charging... one wants to crush the multiverse under his boot, the other to feast on pure despair. An unholy clash shakes the Nine Realms. Midgard burns. Even Ink feels the shockwave. But when the Stars interfere, will the broken god accept help... or embrace his lonely fury? Epic crossover: Asgartale's thunder tyrant vs. Dreamtale's nightmare king. High-stakes action. No mercy. One legendary battle. Read if you love OP Sans fights, multiverse chaos, and broken gods. Undertale & AUs belong to their creators. Fanfiction only.
  • Nightkiller - Toxic by killerlvsflirting
    killerlvsflirting
    • WpView
      Reads 11
    • WpPart
      Parts 1
    This is my first fic, I hope you enjoy. This is about the two characters, Nightmare and Killer. Killer is forever tied to Nightmare. Will he ever escape...?
  • Weekly Underverse by App1eS0uce
    App1eS0uce
    • WpView
      Reads 1,234
    • WpPart
      Parts 68
    Hello! In honor of Underverse 0.8 part 1 coming out and Jakei's year and a half hiatus, I am going to (try to) do this thing I will be calling "Weekly Underverse" where I update weekly with some sort of Underverse related content. It's not going to be anything big. Some weeks it will be a 3,000 word Cross fic, maybe a digital drawing I worked on for 5 hours. Other weeks might be as small as a snippet of a poem that was inspired by an Underverse thing, or a little doodle I did in my notes packet. It may even be recycled content I have posted outside of this project. But whatever it is, I will try to update it weekly until the hiatus is over. Weekly Underverse starts today, November 20, 2024. Updates will (try to) be every Wednesday. Underverse belongs to: Jael Peñaloza Little note: I am nowhere near an Underverse expert, so most things might be fanon, most things might be Cross focused, but maybe I'll do some learning and write with the other characters. Maybe I'll give fun facts one week. We've got about 78 chances so... we'll see where this goes!
  • Royaltale Season 1 by Begone_Cupid
    Begone_Cupid
    • WpView
      Reads 425
    • WpPart
      Parts 16
    This is an Undertale AU I originally planned on making back in 2019 but, I wasn't capable of making all the character designs and forgot about it for two years. A few months ago, I thought about redrawing the only two designs and reviving it as well as changing most of the original plot and instead of making a comic series, I'm writing it so it will be easier to think about more designs. OCs are included in this AU. If you would like yours to make an appearance, message, or tag me to discuss when they can appear. This is season 1 of the series and it will basically follow the events of Undertale because there was a strange, unexpected reset after 10 years of living on the surface. Now, it's up to Frisk to help her friends remember their lives before the reset and save the world before Flowey tries to kill all of humanity as well as monsterkind and Mystickind. Can the determined human survive yet another perilous journey through the Underground or will everyone fall to Flowey's hands (leaves?)?
  • My Life as the Prince's Servant (UF!Asriel x Male Reader) by Ungrateful_Hacker
    Ungrateful_Hacker
    • WpView
      Reads 8,360
    • WpPart
      Parts 22
    After the monsters broke free from the underground they enslaved all of humanity. The monsters took complete control over the world and the world was powerless to stop them. This is the story of a young boy named Matt O'Donnell, a boy who was an orphan during the time of the monster invasion was captured by the prince of monsters, Asriel Dreemurr. Will he find a way out of this dreaded nightmare and be free or will he suffer and die. (I don't own any of these pictures)
  • Under!Glitch by Th3Gl1tchL0rd
    Th3Gl1tchL0rd
    • WpView
      Reads 416
    • WpPart
      Parts 28
    Born in a void, devoid of all life, Glitch Gaster had nothing. He had to watch as other Au's got to experience lives and outcomes.. While he had nothing. He loathed to have what they had. One day, Glitch Gaster witnessed the power of 'OverWrite'. He became obsessed with the idea of true power.. The idea of becoming so strong nobody could oppose him. He wanted a world of his own.. But not just that. He wanted more.. MORE POWER. He wanted to become god of a world. So with Inks help, Glitch Gaster created his own masterpiece.. the 'Glitch' button. Using it, he created a world of his design. A fake world.. With nothing real in it. All to be his plaything.. To satisfy his hunger for more power. But not everything goes how you want it to.. One of his creations suffers a malfunction. A glitch in the code.. And suddenly. He can feel, see, hear.. He's.. Real? But with a power hungry god ruling over his world, can newfound sentience really overpower raw strength when your whole life has been a lie?
  • Epic x Cross Oneshot by Mozziemare69
    Mozziemare69
    • WpView
      Reads 217
    • WpPart
      Parts 2
    this is a wholesome one shot of epic and cross Wholesome and platonic only Request are open for the next story and would love that
  • "True GodVerse: Historie postaci" Tłumaczenie PL by ArchiwumVerse
    ArchiwumVerse
    • WpView
      Reads 164
    • WpPart
      Parts 26
    "Oto jest zbiór historii i początków postaci z True GodVerse. Miejsca, którego niektórzy lubią, a duża większość nie cierpi. Natomiast pomimo tego, raczej warto się dowiedzieć, co nieco o narracji, jaką jest True GodVerse." Tłumaczenie: JA Link do True GodVerse Wiki: https://truegodverse.fandom.com/wiki/Godverse_Wiki
  • UT MV Short Stories (Oneshots??) by ASadNerd
    ASadNerd
    • WpView
      Reads 8,726
    • WpPart
      Parts 24
    My (mostly) short fics that I need to type out before they leave my silly little brain. Full of silly stuff and rarepairs so uh. Have fun. ALSO THE FIRST CHAPTERS ARE SO UGLY AND BAD I SWEAR I DON'T ALWAYS WRITE LIKE THAT PLS JUST SKIP TO CORN FIELD AND DON'T READ ANYTHING BEFORE 💔💔💔💔💔 GHSGSHSH /hj
  • BOOK ONE: The Discarded by nightmarewolfy360
    nightmarewolfy360
    • WpView
      Reads 711
    • WpPart
      Parts 14
    Hm.. Ink and Error truce, many new AUs that have been unfinished, Classic gets involved!? A crazy adventure awaits as Classic discovers new and exciting things, makes new friends, and really gets out there and does something! Join him today! Classic Harem Hints *NOT OBVIOUS AT TIMES* ×My AUs + Others× ×Cartoon-anime-like× ×Swearing× Comic Coming Up! [Concept Art on my YT Channel: NightmareWolfy360] [Cover by @Pushemonpika]
  • Megaverse (Undertale insert oc au) by LeCaptainPancakes
    LeCaptainPancakes
    • WpView
      Reads 44
    • WpPart
      Parts 4
    (Warning this is an insert character au) ℂ𝕒𝕡𝕥𝕒𝕚𝕟 𝕒𝕟𝕕 𝕊𝕔𝕒𝕝𝕖𝕤 𝕙𝕒𝕕 𝕓𝕖𝕖𝕟 𝕒𝕥 𝕖𝕒𝕔𝕙 𝕠𝕥𝕙𝕖𝕣𝕤 𝕥𝕙𝕣𝕠𝕒𝕥𝕤 𝕗𝕠𝕣 𝕠𝕧𝕖𝕣 10 𝕪𝕖𝕒𝕣𝕤 𝕟𝕠𝕨, 𝕓𝕦𝕥 𝕒𝕗𝕥𝕖𝕣 𝕚𝕥 𝕚𝕤 𝕣𝕖𝕧𝕖𝕒𝕝𝕖𝕕 𝕥𝕙𝕒𝕥 𝕖𝕧𝕖𝕣𝕪𝕥𝕙𝕚𝕟𝕘 𝕊𝕔𝕒𝕝𝕖𝕤 𝕕𝕚𝕕 𝕨𝕒𝕤 𝕟𝕠𝕥 𝕚𝕟𝕥𝕖𝕟𝕥𝕚𝕠𝕟𝕒𝕝 𝕥𝕙𝕖𝕪 𝕤𝕖𝕖𝕞 𝕥𝕠 𝕓𝕖 𝕒𝕥 𝕒 '𝕥𝕣𝕦𝕔𝕖'. 𝔹𝕦𝕥 𝕟𝕠𝕨 ℂ𝕒𝕡𝕥𝕒𝕚𝕟 𝕘𝕖𝕥'𝕤 𝕤𝕖𝕟𝕥 𝕥𝕠 𝕒𝕟𝕠𝕥𝕙𝕖𝕣 𝕦𝕟𝕚𝕧𝕖𝕣𝕤𝕖, 𝕒𝕟𝕕 𝕒𝕔𝕔𝕚𝕕𝕖𝕟𝕥𝕒𝕝𝕝𝕪 𝕥𝕒𝕜𝕚𝕟𝕘 𝕊𝕔𝕒𝕝𝕖𝕤 𝕨𝕚𝕥𝕙 𝕙𝕚𝕞. ℕ𝕠𝕨 𝕥𝕙𝕒𝕥 𝕥𝕙𝕖𝕪 𝕒𝕣𝕖 𝕚𝕟 𝕒 𝕨𝕙𝕠𝕝𝕖 𝕟𝕖𝕨 𝕆𝕞𝕟𝕚𝕧𝕖𝕣𝕤𝕖, 𝕙𝕠𝕨 𝕨𝕚𝕝𝕝 𝕥𝕙𝕖𝕪 𝕘𝕖𝕥 𝕙𝕠𝕞𝕖? 𝕎𝕚𝕝𝕝 𝕥𝕙𝕖𝕪 𝕘𝕖𝕥 𝕙𝕠𝕞𝕖? 𝔻𝕠 𝕥𝕙𝕖𝕪 𝕖𝕧𝕖𝕟 𝕨𝕒𝕟𝕥 𝕥𝕠 𝕘𝕠 𝕙𝕠𝕞𝕖 𝕒𝕟𝕪𝕞𝕠𝕣𝕖...? Or in other words, Scales and Captain get sent to a undertale multiverse inside of the undertale Omniverse. I just edited some random Canva template for the cover lmaoo Characters: Captain: My character (From primeverse) Scales: My au (From mythictale) And most other undertale au characters, I'm too lazy to list them all, but I'm sure most of y'all know where these characters are from so I shouldn't need to explain em lol.
  • fanfic ideas and headcanons by IisYourmomhi
    IisYourmomhi
    • WpView
      Reads 16
    • WpPart
      Parts 12
    I don't know what I'm doing here are some headcanons that I found/thought of and here are some story ideas that I made 1# I'm dyslexic 2# if you find an idea or headcanon you are welcome to make a story out of it but please credit me 3# if you don't like something you are welcome to skip it don't make it everyone's problem I hope you have a good day and remember society's a lie this is the matrix buy gold bye all caritors go to their rightful owners I only own the ideas
  • One's Fond Embrace [Revised || New ver. ] by UnderShipper89
    UnderShipper89
    • WpView
      Reads 9,110
    • WpPart
      Parts 58
    Lust is caught up in the drama of being misunderstood, but one love will make him realize he's more than what people believe. This is the revised (and longer) version of One's Fond Embrace. Word Count: 60,000 words (Not counting A/Ns.) ^^ Note: Story is still in progress, so word count will continue to increase. ^^
  • Cruel Story - UndertaleAU comic (English version) by _KarciaNa_
    _KarciaNa_
    • WpView
      Reads 1,452
    • WpPart
      Parts 26
    Cruel Story is the story of Cruel, a skeletal teenager who struggles with a certain "disease" and adversity. Since he was a young boy he has lived in confinement in fear of the cruel world, and as a teenager he must finally face it. Will he succeed? Will the path through life prove to be as difficult as it seems? And what will be the consequences of decisions made years ago? If you want to know the answers to these questions, I invite you to the following chapters. For the record. Cruel is ship child Ink and Dream (yes, that's not a mistake, Dream). His main ship is Gradient x Cruel (Gradel for short), but you will see how the story turns out. (I apologize in advance for my bad English, but I'm from Poland and I just learning. -u-) (Belongs to the FutureVerse universe) Character creators: -Dreamtale - Jokublog -Palette - Angexci / Lasserland -Goth - Nekophy -Gradient - AskComboClub -Luxath - ??? -Desire - 6agentgg9 (?) -Sprinkle & Fury - 6agentgg9 -Moku - ??? -Meteo - andrewture -Loki (Lucifer) - Insane-ej-blog -Blueprint - pepper-mint -Crescent & Starcross - Lunnar-chan -Xcubux - ??? -Lux & Cross - Jael Peñaloza (Jakei) -Ink - comyet -Swap!Sans - Undertale comunity -Error - CrayonQueen -PaperJam - 7goodangel -Cruel - my child
  • || Children of the Legends || by CC4ever2021
    CC4ever2021
    • WpView
      Reads 185
    • WpPart
      Parts 5
    You know the story behind Undertale and its fandom, how ships are a constant thing and some people even make children from them. A common one is Paperjam and their brother Gradient!Sans. You usually see them with Ink!Sans and Error!Sans, them sometimes being a happy family. Keep in mind, Sometimes. But this isn't a sometimes, this family is a wreck. But one day, Gradient and PJ disappear from the Doodle Sphere and the Anti-Void, and no one knows where they had gone. That's not even the odd part. The weird thing about it is the fact that Ink almost seems relieved they're gone. Error is the only one that's worried, yet he has no idea where his son and other child have gone. But after many years, a figure offers a place for those who could be labeled as "Children of the Legends" a safe place far from Ink and his toxic positive towards the multiverse. Not even Ink knows the location of this camp, yet some of these children feel at ease knowing this. But even with everyone safe, there's more to this story. Like where PJ and Gradient have gone, why Ink is so relieved they've disappeared, or even why the camp was made in the first place. Some pieces might decide the children's fates. Whether they get to live with their families or die trying to protect Gradient and PJ's secret. a/n: I fully own Hatchet, Elizabeth, and Violet. I created this au but I did remake some characters to fit this AU, y'know that jazz. Also! PJ and Fresh will be the same age. I like the ship but I don't know their actual ages, just wanted to make that clear. I'll also redraw the cover since I now have a better idea of what I want it to look like.
  • Where's the Punchline? (Underfell AU | Sans x Reader) by sleepyhaven
    sleepyhaven
    • WpView
      Reads 317
    • WpPart
      Parts 6
    A stand-up comedian with a bad temper and low motivation ends up falling for Frisk's homeroom teacher, her irritatingly soft voice, and her smug attitude. Who would've known? There's probably a lame old joke hidden in there somewhere, but he doesn't give a damn about that right now, so maybe come back later, and he'll think of something. (Mostly told from his perspective, but there will be chapters featuring Second Person POV.) ★ ★ ★ • Cover Image Source: chiarasanchi (WordPress + DeviantArt) (wordpress.org/openverse/photos/65392096-97cb-4d5e-87d8-187508aed9cf) • Content Warnings: language mild violence suggestive themes implied alcohol abuse references to depression Please proceed with caution! This is the SFW, 'Fade to Black' version of Where's the Punchline?, so if you're old enough to read the Mature version, then it can be accessed through AO3. • Updates: Fridays - Weekly • Other Stories: Lord, Have Mercy! (Undertale | Sans x Reader) Be Still, My Heart! (Mafiatale AU | Sans x Reader) Strawberry Soap (Overtale AU | Sans x Reader)