Underfellau Stories

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20 Stories

  • Family Secrets {a MobFell/MafiaFell Fic} by mewmewbomb
    mewmewbomb
    • WpView
      Reads 615
    • WpPart
      Parts 4
    Adrienne had been staying with the Gaster brothers long enough to learn about the business they were in, and she'd grown used to it. Just when she thought she knew everything there was to know about them, fate proved her wrong ***STORY COVER ART IS BY CYBERKITTY117 ON DEVIANTART*** ((Let me know what you think and if I should add more to the story! I love writing, but sometimes I need a second opinion or a gentle push to do it))
  • Flowerfell! Sans x Reader by _Leisol_
    _Leisol_
    • WpView
      Reads 15,968
    • WpPart
      Parts 23
    Haro~ This is my first fanfic and story so please enjoy! "Kindness is all we can give, and sometimes kindess is enough..." PLS. READ THE ORIGINAL FLOWERFELL STORY FIRST! I DO NOT OWN FLOWERFELL OR UNDERFELL! BOTH BELONG TO THEIR RESPECTIVE CREATORS/OWNERS.
  • Another Human: an Underfell story by KittyKittenton
    KittyKittenton
    • WpView
      Reads 58
    • WpPart
      Parts 14
    this took too long :(
  • Underfell V by W1ccaphobia
    W1ccaphobia
    • WpView
      Reads 19
    • WpPart
      Parts 3
    When a young boy named Frisk falls into the underground, accompanied only by his strange new friend Flowey the Flower, he must try everything to get both of them to safety and find a way home...or...does he even want to go back home?
  • You were my light (the world is so dark) by A_Bored_Reader
    A_Bored_Reader
    • WpView
      Reads 243
    • WpPart
      Parts 2
    Red had always been by Sans' side. Classic's side. It didn't matter when the story changed or stayed the same, Red would always be there for him. He stayed when Undertale got to the surface, watching as Sans drifted away from him. He stayed when Classic was left bitter by neutral runs, lashing out. But then came the endless genocides. He tried to be there, to try and ease Classic's pain as much as he could. But then, the original AU was locked. When it opened up again, Classic wasn't there.
  • Royalfell (Fellcest) {On Hold} by Gonerkid101
    Gonerkid101
    • WpView
      Reads 17,648
    • WpPart
      Parts 13
    Asgore dies Papyrus becomes the new king Who is he gonna choose as his queen? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A series of one-shots, telling how Sans became Papyrus's queen, and what happens during the time they rule.
  • Underfell Sans X Reader (DISCONTINUED AND DEAD) by ICharaLot
    ICharaLot
    • WpView
      Reads 132
    • WpPart
      Parts 4
    (DISCONTINUED) I have no Idea what to call this. Call It whatever you want. It's an Underfell Sans X Reader. You are in the role of Frisk in the Undertale universe, and something mysterious happens to your reset button. Oh, and you communicate to Chara through thought.
  • Broken Dreams by KingsCrown45
    KingsCrown45
    • WpView
      Reads 178
    • WpPart
      Parts 4
    In a secluded part of the underground a tower exists sounded by a giant stone maze sounded by cavern walls in this space those that live in it consider it a direct world from the rest of the Underground and those that are in the maze thay have no way to escape or at least that's what they thoght
  • underfell papyrus meets undertale by YeetisWhy
    YeetisWhy
    • WpView
      Reads 139
    • WpPart
      Parts 10
    where underfell meets undertale and undertale knows about the au's and undertale gaster is out of the void and will uf sans forgive there gaster for on what he did? Will you guess right make a guess and then read threw. Also this was very hard to make with school and so much more stuff happening.
  • Into the darkness (underfell! sans x reader) by RoGhostt
    RoGhostt
    • WpView
      Reads 17
    • WpPart
      Parts 1
    This is a story about u and underfell!sans. A little edgy mayb
  • The Shadows in Her Eyes. by HavenWelch
    HavenWelch
    • WpView
      Reads 30
    • WpPart
      Parts 1
    In the middle of a reset, Frisk ends up pulling herself into another timeline. It's completely different from the original. She doesn't seem to know why she's there, but her DETERMINATION is higher than ever. Will her MERCY and love pull through? Or will she have to FIGHT with her LOVE to reach the end?
  • but Nobody came (Fellcest) by Gonerkid101
    Gonerkid101
    • WpView
      Reads 9,680
    • WpPart
      Parts 8
    How Papyrus and Sans deals with Sans running away. Maybe their lives will intertwine again. This is an alternate version to the AO3 story 'April Fools'. In the orginal, Sans stays. In my version, Sans runs away. Enjoy!
  • { F A L L E N } Underfell!SansxReader by Spazz-Lord
    Spazz-Lord
    • WpView
      Reads 138
    • WpPart
      Parts 2
    You were simply taking a relaxing stroll with your little brother... Next thing you know, you're stuck chasing your brother up Ebbot, and manage to fall in... Now what? You're stuck in the savage world of "Underfell", seeking your way out. Will you be won over by a pretender, or, will you navigate a way out? At what cost will doing so force you to pay? In this world, the prize is love... And you're simply a small piece of this complicated game. Cover By--- animalice ((Deviantart)) Undertale By--- Toby Fox Underfell AU By--- ((Unknown)) Fanfiction By--- Spazz-Lord
  • Thorns & Roses by FanfictionFnaficRave
    FanfictionFnaficRave
    • WpView
      Reads 7
    • WpPart
      Parts 1
    This is a story about 3 girls and their encounter with unfamiliar faces that happen to be S-k-e-l-e-t-o-n-s and this takes place in the 1920s, So sit back, read and sink in to the drama, romance, danger and spiciness in this story so prepare, take care and read if you dare.
  • This is UNDERFELL. (Highschool au) by Babqftimfelix72
    Babqftimfelix72
    • WpView
      Reads 4
    • WpPart
      Parts 1
    Using my oc and many other charecters, i made a story about- .... i du
  • warm hands by H2ODelirium4
    H2ODelirium4
    • WpView
      Reads 3
    • WpPart
      Parts 1
    I have know idea what i just wrote, but i hope you would like it.❤
  • My True Love Is Spicy (Yet Sweet) by NotTheCookie
    NotTheCookie
    • WpView
      Reads 315
    • WpPart
      Parts 3
    The legend says that love happens in an instant, and the binds between souls is stronger than anything. But what if your soulmate, wasn't who they should be? What if your real match was somewhere else? Stretch and Edge both lay claim to your soul, but which Papyrus do you truly love?
  • Misadventures in the Ruins by thatonefangirltho
    thatonefangirltho
    • WpView
      Reads 597
    • WpPart
      Parts 3
    (Note: installment in the A Knocking at the Door series, if you are unfamiliar with this then I would suggest you read it first!) This is the one shot collection of random events that happen between A Knocking at the Door and it's (soon to be) sequel, A Step Outside the Door. Requests are taken, and this updates literally whenever I have something to write and time to write it. I never said they would be all fun and games though! So please join me as we see the events that transpire between Sans, Papyrus, and Toriel on these completely random one shots. (If something isn't cannon to the story, I'll say so at the top.) (*sigh* Cover art is mine, regretfully... I am not a digital artist at all other than this, so I'm not really proud of it XD but still, my design and such.)