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1.2K Stories

  • Half-Tale: The Fallen by WritingDetective
    WritingDetective
    • WpView
      Reads 9,725
    • WpPart
      Parts 36
    Corporal Adrian Shephard, a US Marine Corps soldier within the HECU division, was sporadically shipped off to Black Mesa for a seemingly simple job: 'cleanup duty'. Despite every single odd stacked up against him, the marine somehow manages to survive the dangerous, alien-ridden facility and, after being detained by the ever-so elusive G-Man, is then suddenly assigned a mission many years later... To the UNDERGROUND! Accompanied by Chara Dreemurr, the first fallen human turned apparition, the two journey through the Underground civilization for one, very specific goal... but what exactly was it? And was that all there was to it? In... time, all will be revealed.
  • Undertale; Despair AU 《REWRITE》 by LocalUndertaleAddict
    LocalUndertaleAddict
    • WpView
      Reads 2,229
    • WpPart
      Parts 58
    What if there was an anomaly in the Underground? No, not Frisk. Not Chara either. Someone else entirely. How could a few measly children stand to this supposedly immortal foe and save the Underground from destruction? Is it even possible to do so? Only one way to tell... ~o0o~ Disclaimers before you start! •There is NO fanon ships. That means no Soriel, Papyton, etc. The only ships are Torgore (in the past) and Alphyne. •This is NOT an x reader. I dislike those types of stories. The reader will have no part in this, and they will not be shipped with anyone. •This exists outside of canon to an extreme. For example, Frisk is the second human and not the eighth. •There will be OCs, but only for a few humans and they still technically exist in normal Undertale. •There is a sequel. I'm planning on rewriting it after this one, as it is much more random and definitely needs it. Clanky, plot holes/retconning, etc. It's more of an OC thing, to explore them and their issues, than an Undertale thing, but it has its similarities. •There will be some explicitives. It won't be unnecessary or excessive, only when it fits the situation and character. I will not be using any slurs, as that's just plain disrespectful, even if some of them apply to me. Credits: Undertale, obviously, created by Toby Fox and Temmie Chang. "The Time Before" by ANinnyMouse42 is the backstory for Sans in this AU with some adjustments (mainly since that was very close to my original idea before I read it and I don't want people to think I copied their masterpiece or smth, if you haven't read it please do so, it's really good). Some things will be in reference to the other books in the trilogy or "From War to Science" by Emotistic-optimistic. If you haven't, read that too. It's really good (along with its sequel). The cover was made by me! Have a good day! (Also, the title is a placeholder, if anyone has any ideas that make more sense, please let me know.)
  • The amazing Undertale of Gumball by KongeegamingYT
    KongeegamingYT
    • WpView
      Reads 90
    • WpPart
      Parts 5
    Gumball, Darwin, and Carrie climb onto mount Ebott and fall down, landing on top of Frisk. The 4 venture to across the underground to escape. NOTE: I watched Gumball on Netflix so I could only watch the first 2 seasons, so I might not know a lot of the Gumball lore.
  • Home and Home Again by SpiritWolfNura
    SpiritWolfNura
    • WpView
      Reads 249
    • WpPart
      Parts 9
    After escaping the Underground and getting clipped by a truck, an amnesiac Sans ends up in the home of a vet, a doctor, and their daughter. He's certainly nothing they've ever seen before, but they can't just let him suffer either, so he becomes the unlikely son. So when Frisk falls into the Underground, Sans must return home to the place he was born and raised. Can he and Frisk free monsterkind from the mountain, or will they make a home Underground with the family Sans lost long ago?
  • Chained Within by Jadegirl224
    Jadegirl224
    • WpView
      Reads 394
    • WpPart
      Parts 13
    Monsters have never been sent to the underground. The war that raged between monsters and humans ended in a draw, but no peace treaty leaving relations tense on both sides. The earth and cities are not in the best of shape after such a war, the weather tending to vary greatly from area to area based on residual magic left behind from the fighting. Some areas are human territory, others claimed by monsters, some simply neutral with a hope of peace and calm. Thieves and bandits are everywhere, the royal guard and police force not able to keep up with their growing numbers and largely leaving them alone at this point. Technology continues to advance, with each race constantly trying to outdo the other. Jade lives and fends for herself, currently living in an abandoned warehouse near the Hotland district, in the more desert and neutral areas between there and the human city of Külaküla. What happens though when she stumbles upon an interesting sword leading to long journey? - - - - - DISCLAIMER: I do not own Undertale or Transistor. This is a fanmade story that will have elements from both but will follow the story and head canons I accept or want to use for the sake of this particular story-line. This story will have influence from Undertale, Echotale, Transistor, and my own au Tomadachitale. You don't need to have information of them all before beginning, I'' be doing my best to explain everything at some point in the story and you can comment questions you may have about it! Plus, I'll be adding some of my own spins anyway. Thank you :3
  • After The Sunrise: An Undertale Fanfiction by RomanticFirefly
    RomanticFirefly
    • WpView
      Reads 31,688
    • WpPart
      Parts 29
    It was really hard for you to make friends, until Papyrus came along. No one laughed at your jokes, until Sans came in with his own puns. No one watched anime with you at midnight until you met Alphys. No one taught you to stand up for yourself, but when Undyne came along, you learned. You couldn't consider anyone as your mom, until Toriel decided to take care of you. No human was you friend, until Frisk came. After the monsters came back to the surface and began to live peacefully with the human world, your entire life changed. Not only did you hear one of the greatest stories told, but you got to see the people inside the story, and make your own with them. Isn't that cool? But then, your story takes a new turn. Will you be able to save your memories, and your new friends, or will you just have to let them go? So, obviously, this is a fan-fiction. I have recently began to have a huuuuge interest in Undertale, and this is what happens when you put a crazy writer in a videogame. Inspiration. Now, I would like to state that I used to HATE HATE HATE fanfictions, because I didnt know if the creator of Undertale, Toby Fox, would approve. Now I understand that this is a way to show the creator of a work that you love his idea. This is dedicated to Toby Fox, who made a great videogame, and many loveable (or killable for all you genocide maniacs in the universe. Me, I don't have the heart to kill all those amazing souls...) characters. I promise that I will try to keep the personalities of your characters true. And this is for all the people who play undertale, and have wondered what it would be like to live with them, after watching the sun rise? It's not the best, but it's my best shot. Hope you have fun reading my story.
  • Little Lyrebird(G!Sans x Reader) [DISCONTINUED] by xXDiabolicEnigmaXx
    xXDiabolicEnigmaXx
    • WpView
      Reads 74,648
    • WpPart
      Parts 29
    He created me to become the people's art. But he has only created the perfect weapon. (Cover drawing is not mine)
  • A Jaded Emerald [NOT LOOKING FOR ART COMMISSION] by KTama20
    KTama20
    • WpView
      Reads 9,404
    • 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)
  • Royaltale Season 1 by Edgy_Da_Uni
    Edgy_Da_Uni
    • WpView
      Reads 571
    • WpPart
      Parts 19
    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?)?
  • Makoto's Trip Into the Underground (THH X UNDERTALE CROSSOVER) SHORT HIATUS! by Himari360
    Himari360
    • WpView
      Reads 158
    • WpPart
      Parts 5
    Makoto felt his soul, restocking with more and more DETERMINATION as it pained him, so, so much that even his friends are worried. After beating Junko, for the trillionth time, Makoto, having enough DT must try to not reset, but is faced with the obstacle of his friends finding out. And soon enough, all his friends storm into Naegi's room and confront him, asking him for the truth of why he looked tired. Makoto tries to shake it off, saying that he was just having a bad day, but his friends know better. But, something sudden occurs, and Naegi's friends start to learn the truth, of all of Makoto's secret friends Makoto made at the age of six no one knew of, and the life threatening events Makoto has gone through. Read more to find out what happens! Also, I know nothing about honorific, so everyone call each other by their first names or last names, and forgot to mention, Makoto and Kirigiri are dating in this book!
  • D.V. Serif: The Fourth Skeleton by GoldstarXD
    GoldstarXD
    • WpView
      Reads 85
    • WpPart
      Parts 6
    D.V. Serif was always forgotten. Nobody paid her attention. Except one of her brothers, Sans. They knew all about W.D. Gaster, but nothing about her. She was the one monster that Chara didn't kill in certain timelines. But she knew all about every one of them. She held the power to reset, to remember the timelines, to alter them. She could do what even Flowey could not. She could create anything... But nobody seemed to know, or to care. Until now. (I kinda changed her name a bit. D.V. stands for DejaVu. So she's DejaVu Serif, okay?) Discontinued
  • MY CHILD , undertale parent scenarios by musepetal3
    musepetal3
    • WpView
      Reads 64,120
    • WpPart
      Parts 27
    ♡ ; here, you can be the child of certain characters from undertale. i hope you enjoy, traveler. ☆ ; art credit . indydrawsart on tumblr
  • More Than I Should [A US!Sans x Female Reader] by _OneBeanHalfABrain_
    _OneBeanHalfABrain_
    • WpView
      Reads 96
    • WpPart
      Parts 3
    A human... An infant... Left in a tattered basket... Left crying in a cushion of golden flowers... Left only with a blanket and a locket bearing her name... (Y/n)... Raised by Asgore, spending her life in the ruins... She was bound to made many wonderful new friends... But... What if one... Is no ordinary friend? ... |{A/n: This book (at least the first few chapters) was slightly inspired by EightTheKat's comic 'The Seventh Soul'. Unless specified by me, none of the art contained is mine. Undertale belongs to Toby Fox. Underswap belongs to Popcorn Pr1nce (i think). Also the first couple reads are probably from me rereading this cuz I do that XD Also, updates will be slow, so I apologize in advance.}|
  • Undertale X Reader / 𝙰𝚗 𝚄𝚗𝚍𝚎𝚛𝚐𝚛𝚘𝚞𝚗𝚍 𝐋𝐨𝐯𝐞. by Shizu_mi
    Shizu_mi
    • WpView
      Reads 143
    • WpPart
      Parts 5
    -Name:(Y/N) -19 years old Lives in: Town near MT.Ebott Relationships:Unknown ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Okay,hello everyone,this story is a 'x reader' Hopefully you all enjoy this story. But it's muy First one so i'm sorry If there are any errors in the writing. Well,in this story i Will be using they/them pronouns for the reader, because i want everyone feeling included in my book. So well,i really Hope you like this book ^^ Oh,and just so you know,im not giving too much information abt the reader because that's what you are going to find out here :)
  • Number All my Bones: There and Back and There Again by Teresaistired
    Teresaistired
    • WpView
      Reads 581
    • WpPart
      Parts 37
    A story in memoir style from the point of view of the Dr. Gaster of Glitchtale entailing the events in between "My Sunshine" and what will happen in the next episode.
  • That New Robot Girl?! (Napstablook X Reader) by PastelGalaxy1
    PastelGalaxy1
    • WpView
      Reads 31,313
    • WpPart
      Parts 30
    Your violet aka (Y/N) your the new robot you make music like napstablook like EDM, Dubstep, Electro and more but when mettaton said you would go on stage with him you were so surprised that you didn't realised that napstablook was there too
  • Sleepy Bones by Tardis11Gal
    Tardis11Gal
    • WpView
      Reads 44
    • WpPart
      Parts 1
    When Sans and his brother realize that he has developed a sleeping disease known as narcolepsy (coupled with catalepsy), they become distressed and go to Dr. Alphys for help. This is their journey... Enjoy! <3
  • Selfless Determination [Undertale Fanfic | Sans x Reader] by momofroggy
    momofroggy
    • WpView
      Reads 70
    • WpPart
      Parts 2
    Sans breaks the universe by managing a dodge at the supposed final battle blow during a genocide run. The timeline, the universe was broken. The only way to repair the damage would be a hard reset from Frisk, to restart the game from the very beginning, and so they do. But what happens when it isn't Frisk that falls into Mt. Ebott? A completely new soul of determination. Everything had truly reset. A pure beginning. ----------------------- Undertale belongs to Toby Fox™ The only thing I own is the cover art, character design, and story concept!
  • Spanking Tales Of The Underground by mastervegeta
    mastervegeta
    • WpView
      Reads 196
    • WpPart
      Parts 4
    Assorted Undertale spanking fics that I write on the future without my OC, that aren't their own series will be added as chapters to this series!
  • You're Gonna Have a Bad Time by helloiwannadieplzah
    helloiwannadieplzah
    • WpView
      Reads 1,571
    • WpPart
      Parts 5
    [gen•o•cide (n) \ˈjenəˌsīd\ the deliberatley killing of a large group of people,especially those of a particular ethnic group or nation.] •|RESTART|• |CONTINUE| you chose.......