1 - 20 of 3509 Works in Alternate Universe - Underfell (Undertale)

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  1. Tags
    Summary

    Sans lives on the Surface, free and happy for the first time since he can remember. And then he starts seeing another monster who looks strangely like him, in mirrors and in dreams. When he ends up in a darker version of the Underground, Sans must find a way back home – all while trying to keep messy things like feelings out of the equation.

    Written in the style of Catsitta’s 100 Daily Drabbles, with no more than 250 words in a chapter. Best read in Entire Work mode.

    Language:
    English
    Words:
    4,955
    Chapters:
    39/?
    Comments:
    388
    Kudos:
    141
    Bookmarks:
    13
    Hits:
    2143
  2. Tags
    Summary

         Y/n was having a nice day walking down the sidewalk. She had just gotten off with work and had exited the office wearing her coat since it was a chilly fall.  “Hey Y/n!” Macy y/n’s coworker waved running to catch up to y/n. “Would you wanna go get chicken wonton tacos? I want to introduce you to my fiance Travis.” She said pointing to a boy near her. “ Oh hello” They stood there talking for a while. Suddenly a scream rang out a man in a dark coat rushed forward with a knife down the street. Heading straight for Macy. Y/n always the quick thinker pushed macy out of the way and ended up taking the knife to the gut. Y/n fell over. Blood started to pour from the wound. y/n gasped she could hear people screaming “someone call 911!”  She started to cough up blood from her mouth and nose. The edges of her vision started to blur. She struggled to stay awake. However in the end y/n succumbed to her injuries on the spot. You died and that should be the end right? Well monsters come back and a new beginning starts hopefully new relationships start to bloom too as you get used to your new skeleton body and magic.

    Language:
    English
    Words:
    17,347
    Chapters:
    18/?
    Comments:
    327
    Kudos:
    159
    Bookmarks:
    36
    Hits:
    2987
  3. Tags
    Summary

    Frisk chantait pour vivre. Elle chantait dans des clubs peuplés de mafieux, de meurtriers et des criminels les plus violents que sa ville avait à offrir. Elle pensait sincèrement que les choses ne pouvaient pas empirer jusqu'à ce que la corruption sous la forme d'un squelette souriant entre dans sa vie. Son nom : Sans.

    Elle a essayé de s'enfuir, mais peu importe où elle allait, il l'attendait toujours.

    Language:
    Français
    Words:
    32,734
    Chapters:
    7/?
    Comments:
    27
    Kudos:
    8
    Bookmarks:
    1
    Hits:
    337
  4. Tags
    Summary

    The forest is full of life and sounds.
    The birds, the flowers, the waterfalls and of course...The Soul.
    Monster and Humans all have a soul song.
    Why not hear them out, and help depressed skeletons get over their issues.

    Language:
    English
    Words:
    22,260
    Chapters:
    4/?
    Comments:
    46
    Kudos:
    204
    Bookmarks:
    41
    Hits:
    1579
  5. Tags
    Summary

    Sometimes life throws you a curveball. For you, your curveball was going to bed looking like a human, and waking up looking like a monster.

    A skeleton monster to be precise.

    With the barrier breaking, a large surge of magic descended on the town you live in, and transformed you overnight. Unsure what to do with you, and the others changed, you're ushered into a facility until a monster with similar magic can take you to teach you how to wield the now uncontrollable magic you've been given. After waiting in this place for four years, you'd given up hope that anyone would ever want to take you.

    What a surprise for you when you find out that someone does. A lot of someones.

    Language:
    English
    Words:
    80,099
    Chapters:
    13/?
    Comments:
    575
    Kudos:
    1013
    Bookmarks:
    236
    Hits:
    16195
  6. Tags
    Summary

    Y/n is Ink's other half. She was created the moment Ink was but her existence wasn't meant to be known. When Ink left their Au so did she but ended up in what she calls 'Reality.' As Ink makes the new Au's Y/n makes the 7th humans that fall and all before them. She also creates the humans that live on the surface. Her existence is still unknown but she knows Ink and Error. She watches them and makes sure they don't go too far. She has never been forced to intervene, not even during the x-event. While watching Ink and Error she had suddenly gained a soul-mark. She was more excited than usual and she searched the Au's for her perfect match. She found them in the Undertale Au and quickly made a portal to the Au. Y/n met one of her soulmates which led her to the rest of them and she couldn't be more happy. Literally.

    Language:
    English
    Words:
    4,483
    Chapters:
    2/?
    Comments:
    16
    Kudos:
    46
    Bookmarks:
    14
    Hits:
    301
  7. Tags
    Summary

    A science experiment created by humans (Y/n) Knows little of her own kind, and little of the world from hiding with her human family. When the barrier breaks and monsters integrate with society (Y/n) sees this as her chance to have a normal life. When she finally sees another skeleton who's to say what may happen?

    Language:
    English
    Words:
    23,488
    Chapters:
    12/?
    Comments:
    109
    Kudos:
    372
    Bookmarks:
    71
    Hits:
    5559
  8. Tags
    Summary

    Mc Dies and becomes fresh sans

    Language:
    English
    Words:
    7,404
    Chapters:
    7/?
    Collections:
    1
    Comments:
    4
    Kudos:
    28
    Bookmarks:
    10
    Hits:
    297
  9. Tags
    Summary

    A collection of one shots during Finding A Safe Haven.

    Series
    Language:
    English
    Words:
    7,568
    Chapters:
    4/?
    Comments:
    16
    Kudos:
    28
    Hits:
    384
  10. Tags
    Summary

    You are a skeleton. You don't know why you're a skeleton. Either way, there's one burning question that you must find an answer to: if you're a skeleton, how the hell did you reproduce?!

    Language:
    English
    Words:
    1,552
    Chapters:
    2/?
    Comments:
    3
    Kudos:
    34
    Bookmarks:
    11
    Hits:
    280
  11. Tags
    Summary

    Sans worked so hard to protect and provide for you and him after shit hit the fan. Blood and dust covered anything and everything, from the cold ground, to your skin and feathers. You were all he had and he was willing to push you into another universe if that meant you’d be away from Them.

    And when death was waiting just at his doorstep, he finally did it.

    Language:
    English
    Words:
    46,766
    Chapters:
    21/?
    Comments:
    258
    Kudos:
    690
    Bookmarks:
    133
    Hits:
    9922
  12. Tags
    Summary

    ~Ava’s Guide to Invading the Multiverse~
    Step One - Go Fishing

    Language:
    English
    Words:
    268,966
    Chapters:
    98/?
    Comments:
    2534
    Kudos:
    1450
    Bookmarks:
    175
    Hits:
    26421
  13. Tags
    Summary

    This will include little short storys, extras, and headcannons that can't really be explained very well in the main book.

    Series
    Language:
    English
    Words:
    1,389
    Chapters:
    5/?
    Kudos:
    4
    Bookmarks:
    1
    Hits:
    109
  14. Tags
    Summary

    A collection of one-shots, in which you get a peek at day-to-day life of lovers. Or, sometimes, just friends.
    __

    Just a warning, I'm going to start putting * for trigger warnings, which include (but not limited) to character death, suicide, depression, referenced sexual/physical/verbal abuse on a child/adult, and more. Stay safe, ya'll.

    Language:
    English
    Words:
    95,519
    Chapters:
    66/?
    Comments:
    224
    Kudos:
    506
    Bookmarks:
    33
    Hits:
    12257
  15. Tags
    Summary

    I had the idea to personally challenge myself to write a little Frisk/Sans fanfic everyday for a whole year starting on May 1st. This collection of oneshots will follow the course of their budding relationship on the surface. Important to note that Frisk is 19 and a girl. Also, this is the AU Underfell, not Undertale. While I will be writing some everyday, that doesn't necessarily mean I'll write an entire chapter everyday, so my updates should be regular, but not daily

    Language:
    English
    Words:
    5,868
    Chapters:
    2/365
    Comments:
    10
    Kudos:
    7
    Bookmarks:
    3
    Hits:
    101
  16. Tags
    Summary

    Even more drabbles for the 'By Any Other Name' universe

    Series
    Language:
    English
    Words:
    3,780
    Chapters:
    4/?
    Comments:
    44
    Kudos:
    94
    Bookmarks:
    2
    Hits:
    774
  17. Tags
    Summary

    Sans vive en la Superficie, libre y feliz por primera vez desde que tiene memoria. Y entonces comienza a ver a otro monstruo extrañamente parecido a él en los espejos y en sus sueños. Cuando termina en una versión oscura del Subterráneo, Sans debe encontrar la manera de volver a casa, todo mientras intenta mantener las cosas complicadas y confusas -como las emociones- fuera de la ecuación.

    Escrito originalmente en el estilo de Catsitta de Drabbles Diarios de 100 palabras, con no más de 250 palabras por capítulo (en esta traducción pueden ser más). Es mejor si se lee en el modo Entire Work (Todo el Trabajo).

    Language:
    Español
    Words:
    5,216
    Chapters:
    38/?
    Kudos:
    3
    Hits:
    43
  18. Tags
    Summary

    Broke with little support, someone from somewhere in your childhood conveniently leaves you a voicemail inviting you to stay at her place, you take it. Where does that get you?

    Stuck in a circlejerk of magical raging skeletons, but thats fine, you can spit back.

    Language:
    English
    Words:
    7,175
    Chapters:
    4/?
    Comments:
    25
    Kudos:
    65
    Bookmarks:
    21
    Hits:
    852
  19. Tags
    Summary

    Once upon a time, You had everything.
    You were born into a loaded family that would have taken you anywhere. It goes without saying, anyone in their right mind would have stayed, At least until college.
    Not you, though.
    Nope.
    At fifteen, you chose to leave the security of your family’s wealthiness, and to this day you have no excuse for your actions.
    You just left it all behind, building a new life for yourself in Ebott City, a place known for its Monster population.
    It was a dangerous life, the one you created, but you loved it anyway.
    You fight for money under the table at an illegal combat ring called The Grounds. The boss cared nothing for your lack of credentials and embraced you the first day you showed up, begging for a job.
    It’s been quite a few years, thousands of bruises, hundreds of scars…
    And still, you wouldn’t change it for the world.
    But maybe, you’d change it for a handful of skeletons.
    Maybe.

    Language:
    English
    Words:
    71,065
    Chapters:
    19/?
    Comments:
    209
    Kudos:
    505
    Bookmarks:
    107
    Hits:
    6957
  20. Tags
    Summary

    Our dear Mariposa Miller was found dead, most presumably murdered but by who?

    The skeletons think it's you.
    You know it ain't you.

    So what do you do?
    Prove your innocence.

    Not by taking the case of a certain fish's hands (radial?) and putting them in your own.
    And guess what!
    These skeletons are gonna try and ruin your life.

    Language:
    English
    Words:
    2,032
    Chapters:
    3/?
    Comments:
    14
    Kudos:
    68
    Bookmarks:
    23
    Hits:
    755

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