1 - 20 of 3905 Works in Alternate Universe - Underfell (Undertale)

Pages Navigation

Listing Works

  1. Tags
    Summary

    Look but do not touch, the warnings go, for if you caress a beautiful thing indelicately then it shall suffer.

    Language:
    English
    Words:
    3,656
    Chapters:
    2/?
    Comments:
    4
    Kudos:
    6
    Hits:
    68
  2. Tags
    Summary

    Just a rare pair that i got from a one-shot fic off of Wattpad, that i loved so here we are. Also the main pairing is Reaper!Sans/Dust!Sans. If you dont like it then please find something else to read. Thank you

    (Other ships that will get some scenes in the story )
    Error x Nightmare (Errormare | Engaged)
    Horror x Farm sans (Bloodycrops (I think )
    Cross x Killer (Koss/Criller)
    Classic x Red/Fell (Kustard | married )
    Dream x Blue ( platonic)
    Sci x Outer (Idk shipname)
    Fresh x Dance (idk shipname)
    Bill(Sans) x Error404 (idk shipname | married )

    Language:
    English
    Words:
    5,389
    Chapters:
    11/55
    Comments:
    6
    Kudos:
    33
    Bookmarks:
    5
    Hits:
    1004
  3. Tags
    Summary

    After the Fall of Atlas, Remnant huntress Weiss Schnee finds herself in a very strange world where everything is different, and huntsmen have never existed. As she struggles to find out what has happened to her (and the Relic of Knowledge that came with her), six strange, magical (and... rather demanding) skeleton monsters take her in, though they know nothing about her or what's happened to her, offering her protection from a world she knows nothing about.

    Of course, only in exchange for her services as a... maid?! A Schnee heiress, working as an indentured servant?!

    But there's yet another problem: in this world, humans don't have anything like Aura or Semblances. And if these skeletons find out that Weiss has them, they might think she's a mage.

    Given how... antagonistic these skeleton monsters are towards humans in general, and monsterkind's history with mages...

    Well, Weiss has quite a balancing act to keep up in this mansion.

     

    (NOTE: This work assumes that you are up-to-date with RWBY Volume 8 - if you haven't finished that volume, a lot of stuff I've written here will not make sense. I make some minor canon changes to get to the setup, but very minor.)

    Language:
    English
    Words:
    101,299
    Chapters:
    11/40
    Comments:
    100
    Kudos:
    133
    Bookmarks:
    22
    Hits:
    2188
  4. Tags
    Summary

    Mars, an alien, crash lands into the yard of a couple of skeletons who live in the middle of basically nowhere.

    When they wake up, they don’t know what is going on, and aren’t sure if these new faces understand them or even trust them.

    Language:
    English
    Words:
    422
    Chapters:
    1/?
    Hits:
    3
  5. Tags
    Summary

    Once Milord was satisfied, Mutt finally gets to meet his alternative counterparts. In doing so, he meets someone tall, dark and actually interested in him? its unknown territory for him but luckily he's got a good guide.

    Language:
    English
    Words:
    1,960
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    13
    Bookmarks:
    1
    Hits:
    49
  6. Tags
    Summary

    Underfell AU. Flowey has become Asriel again, and Asriel is adjusting to have his old body back. When his girlfriend Frisk proposes a trip to the beach, Asriel gets a chance to savor all the sensations he never realized he missed as Flowey.

    Language:
    English
    Words:
    4,187
    Chapters:
    2/2
    Comments:
    5
    Kudos:
    16
    Hits:
    325
  7. Tags
    Summary

    To most of the world, magic was a thing of legend. It was rampant in stories but didn't exist in reality. Hidden in the world, however, were monsters and mages, all safely shrouded in secrecy to keep "normalcy" preserved. Three years ago, the secret came out.

    Three years ago, Mount Ebott became a swirling vortex of energy that prevents most technology and magic from working. It opened up and monsters came onto the surface, which revealed those never sealed beneath the mountain and the humans with magical ability.

    Technically, Mount Ebott is super dangerous. You still jog there two times a week.

    Series
    Language:
    English
    Words:
    7,257
    Chapters:
    3/?
    Comments:
    15
    Kudos:
    32
    Bookmarks:
    9
    Hits:
    313
  8. Tags
    Summary

    What happens when you combine a depressed mess in an abusive relationship with a mix of overprotective and semi emotionally constipated skeletons. Fun times, let me tell y'all.

    Language:
    English
    Words:
    9,783
    Chapters:
    3/?
    Comments:
    5
    Kudos:
    9
    Bookmarks:
    4
    Hits:
    184
  9. Tags
    Summary

    You've worked with difficult people before, but...these skeletons were on a whole other level. If Undyne had warned you just how crazy they were, you probably wouldn't have agreed to help the queen in the first place.

    But due to unfortunate circumstances, Mt. Ebott was the safest place for you to be. And in order to stay, you had to join the Royal Guard.

    Now, with threats of war breaking out, you find yourself torn on whether or not you should help this mixed bag of good and evil monsters.

    But one thing was for sure...you'd sooner die than give up your newfound refuge. You were ready to fight and protect your home.

    And these skeletons didn't seem to understand that you were serious.

     

    An Undertale Reverse Harem Story.
    This fanfic is a fem reader insert.
    NOOO SMUT OR LEMON, just an emotional rollercoaster :)

    Language:
    English
    Words:
    4,690
    Chapters:
    3/?
    Comments:
    14
    Kudos:
    32
    Bookmarks:
    7
    Hits:
    361
  10. Tags
    Summary

    Underfell Papyrus comforts you while you struggle with self harm.

    Language:
    English
    Words:
    515
    Chapters:
    1/1
    Kudos:
    18
    Hits:
    66
  11. Tags
    Summary

    I wish I could throw snowballs like Swap sans does.

    Language:
    English
    Words:
    963
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    8
    Bookmarks:
    1
    Hits:
    52
  12. Tags
    Summary

    The Fell brothers are on the surface and out of the hellhole they call home. Edge has a good job and friends and hobbies. Red is still the piece of shit he's always been, but now he has Sans, who despite his best efforts to hide it is the best thing that ever happened to him.

    If Red would stop making excuses and allow himself something good for once, he could actually be happy for the first time in his life. But maybe he's right that everything is temporary. After all, in a world where there's still an undeniable tension between monsters and humans and everything can reset at any time, is it even worth getting attached? Is being happy, even just for a little while, worth the pain that comes with it if everything he loves is lost?

    Language:
    English
    Words:
    71,593
    Chapters:
    26/30
    Comments:
    326
    Kudos:
    280
    Bookmarks:
    48
    Hits:
    6992
  13. Tags
    Summary

    “You don’t even have a boyfriend!” She stamped her foot like a toddler in timeout.

    You didn’t even have to think about what you were going to say. It came out before your mind could process that it was not the correct response.

    “Yeah, that’s why I fucked yours.”
     

    This is inspired by a TikTok (yet again)... due to popular request in the comment section of one of @weirdo_number_3's videos, here is the story of Y/N accidentally disrupting a toxic relationship by being "the other guy."

    Warning: this story involves intoxication/intoxicated infidelity so if that's not on your moral compass (it surely isn't on mine) just turn a blind eye. I don't condone nonconsensual second partners, but I wrote this for the sake of the joke.

    Language:
    English
    Words:
    984
    Chapters:
    1/1
    Comments:
    6
    Kudos:
    28
    Bookmarks:
    1
    Hits:
    328
  14. Tags
    Summary

    You're just a lil ghost, stuck in the house you died in and slowly growing mad from boredom.

    You weren't really expecting Them.

    Language:
    English
    Words:
    6,247
    Chapters:
    6/?
    Comments:
    73
    Kudos:
    284
    Bookmarks:
    56
    Hits:
    2457
  15. Tags
    Summary

    Have you seen him? The man who speaks in hands?

    You end up in a universe very different from your own, and are trying to make the best of a very weird situation. You're not very good at it, but neither are any of these skeletons.
    ***
    God okay I'm writing this for Me, this is a selfish self insert for my depressed ass. (Changed the title to something I don't hate, formerly Bones, Japes, and Razorblades)

    Language:
    English
    Words:
    12,434
    Chapters:
    7/?
    Comments:
    38
    Kudos:
    188
    Bookmarks:
    45
    Hits:
    2234
  16. Tags
    Summary

    Thirty-three years you spent filling the lonely void in your chest with fairytales and fantasies of a normal life.
    Twenty-three years you spent raising your siblings into weapons just as Mother raised you. Many nights you held them as they cried their guilt into your shirt, promising you’d bear the weight of their sins for them.
    Ten years you spent completely and utterly alone with nothing but your books and Mother’s cruelty.

    You didn’t know who you were. You knew who you loved and what you’d done. You knew what you were capable of and you knew what you wanted.

    When Mother told you that you had a guest to entertain, you felt sick. There was no leaving this place, all you could do is make their stay as comfortable as possible.

    Perhaps, if you did a good enough job, they’d like to be your friend.

    Language:
    English
    Words:
    16,000
    Chapters:
    7/?
    Comments:
    28
    Kudos:
    144
    Bookmarks:
    42
    Hits:
    1963
  17. Tags
    Summary

    You've fought for years for people who hate and humiliate you, see you as more of a nuisance than a hero. A menace to society, just like your mentor. But you keep going, keep fighting. Keep pushing your limits to save innocent's who get tangled in the cruel web of life that you walk as a shadow. As someone who expects nothing but gives their all.

    But you keep going You'll deal with whatever and whoever threatens the lives and safety of innocents (both monsters and humans) because you are a spider. And spiders will never go down without a fight.

    Tired and injured you go to deal with one of your greatest enemies, a skeleton who like you loves puns but is dangerous. More so than anyone could ever imagine. But instead of wrapping the night up quickly like you want you're faced with something neither of you can understand. A machine that goes haywire leaving you injured and in the mercy of the two skeleton brother's and their clones

    But you won't back down. You will fight even if your hope isn't what it used to be. Maybe this 'other mansion' of skeletons will finally break the walls you were forced to put up in order to survive. Maybe, just maybe-

    You'll finally realise how amazing you are

    Language:
    English
    Words:
    46,435
    Chapters:
    10/?
    Comments:
    161
    Kudos:
    350
    Bookmarks:
    90
    Hits:
    5040
  18. Tags
    Summary

    Set after the events of MyTale. The multiverse holds limitless possibilities, and multiple chances to do things over. Maybe struggling to do things right will build the path toward redemption? Or at least give some closure to a guilty and troubled mind.
    Multiple fourth-wall breaks. Self-insert as Frisk. Some suggestive stuff here and there, but no romance that's out of canon. Can be read as a stand-alone if you don't mind spoilers.

    Series
    Language:
    English
    Words:
    38,676
    Chapters:
    7/26
    Comments:
    11
    Kudos:
    6
    Bookmarks:
    2
    Hits:
    148
  19. Tags
    Summary

    Hello there Reader! Your name is Dee! And you have just moved back to your hometown of Ebott! Though after 17 years it sure looks different! As you return to your beloved hometown, now a capable 24 year old human being, you can't seem to shake the chill of your past and the effects it's having on your mental state. Oh! But maybe those nice skeleton monsters can help chase away these pesky memories.

    *Reader is an AFAB She/Them. Not your cup of tea then move on. :)

    **Updates are ever Friday or Sunday at 5PM EST!

    Language:
    English
    Words:
    91,833
    Chapters:
    23/?
    Comments:
    112
    Kudos:
    134
    Bookmarks:
    44
    Hits:
    4937
  20. Tags
    Summary

    The King of Hell is dead. The Barrier is Broken. This is where most stories would end. A triumphant period marking a long, heart wrenching sentence. However, one story’s ending is another’s beginning. Frisk, a woman who’s survived everything life had to throw at her, is about to embark on a brand new journey as not only a savior to monsterkind, but also their ambassador to the very humans who had locked them underground in the first place. A daunting task, indeed.

    But she’s not alone, not this time. At her side stands Sans Gaster, her most trusted ally and more importantly, her devoted lover. Can their love withstand the trials the world has to throw at them? From the shadows of their past come back to haunt them to the rise of hatred and the fear of Hell on Earth? After months of asking “What Do You Want?” one can only hope that the answer will forever be “You.”

    Series
    Language:
    English
    Words:
    72,575
    Chapters:
    12/80
    Comments:
    59
    Kudos:
    42
    Bookmarks:
    11
    Hits:
    1289

Filters

Filter results:
Submit

Include

?
Include Ratings
Include Warnings
Include Categories
Include Fandoms
Include Characters
Include Relationships
Include Additional Tags

Exclude

?
Exclude Ratings
Exclude Warnings
Exclude Categories
Exclude Fandoms
Exclude Characters
Exclude Relationships
Exclude Additional Tags

More Options

Crossovers
Completion Status
Word Count
Date Updated
Submit

Pages Navigation