1 - 20 of 1474 Works in Alternate Universe - Underswap (Undertale)

Pages Navigation

Listing Works

  1. Tags
    Summary

    smut from tumblr and other general sexies!

    Language:
    English
    Words:
    9,459
    Chapters:
    6/?
    Comments:
    4
    Kudos:
    26
    Bookmarks:
    2
    Hits:
    398
  2. Tags
    Summary

    A night of drinking while trying to fix a broken heart may have been the best decision you ever made.

    Language:
    English
    Words:
    39,943
    Chapters:
    10/?
    Comments:
    286
    Kudos:
    494
    Bookmarks:
    78
    Hits:
    6101
  3. Tags
    Summary

    You know the tale. A boy who just wanted to be left alone took a bite of an apple and he let the negativity and hate fill him and consume him. Though, this one is a bit different. After all, whoever suspects the positive one to be the most dangerous?

    ***

    WARNING: MIGHT CONTAIN SCENES THAT TUG YOUR HEART, LANGUAGE, NOT FOR THE FAINT OF HEART, TALK ABOUT TOPICS SENSITIVE TO SOME PEOPLE AND OTHER THINGS.

    READER DISCRETION IS ADVISED.

    ***

    EMPIREVERSE BELONGS TO @lunnar-chan
    EMPIRESWAP BELONGS TO @Otaku553
    DREAMTALE BELONGS TO @jokublog
    ERRORTALE BELONGS TO @crayonqueen
    INKTALE BELONGS TO @comyet
    UNDERSWAP BELONGS TO UNDERTALE COMMUNITY
    OTHERS TO BE ADDED
    UNDERTALE BELONGS TO TOBY FOX

    Language:
    English
    Words:
    221
    Chapters:
    2/?
    Kudos:
    1
    Hits:
    19
  4. Tags
    Summary

    I'm taking requests. Please read rules inside.

    Language:
    English
    Words:
    8,174
    Chapters:
    3/?
    Comments:
    18
    Kudos:
    5
    Bookmarks:
    2
    Hits:
    79
  5. Tags
    Summary

    Sequel to True Soul - two and a half years after the Underground Monsters escaped Mt Ebbott have passed and there are still problems between humans and monsters. And if that wasn't enough, an Organization of Monster Hunters have arisen up to attention, attacking monsters and their humans allies, causing fear and chaos for humanity and monster kind. And people are starting to wonder if the Monster Hunters are right or if they are wrong.

    The question is, will there be a new war and just how many will die this time? And what the hell did Gaster do this time to cause a paradox in reality?!

    And who is messing with the timelines and alternate dimensions?

    Series
    Language:
    English
    Words:
    89,954
    Chapters:
    25/?
    Comments:
    14
    Kudos:
    44
    Bookmarks:
    4
    Hits:
    1139
  6. Tags
    Summary

    The South Pole Station is equipped for research and Edge has always made sure things run smoothly for the inhabitants. His charges are meant to follow his rules and regulations, and in turn, he makes sure they survive in the arctic temperatures. It takes plenty of hard work and determination and Edge, along with his crew, can handle both.

    He wasn't counting on one of the newest researchers. He wasn't expecting Rus.

    Language:
    English
    Words:
    7,616
    Chapters:
    2/?
    Comments:
    29
    Kudos:
    57
    Bookmarks:
    4
    Hits:
    236
  7. Tags
    Summary

    You really shouldn’t have gone into the woods for your morning runs, but you did… and now you suffer the consequences. You are the soul mate of an unhealthy amount of monsters and when you say monsters you didn’t just mean the species. They were sick. They slaughtered every monster in the Underground, they ate other humans, they killed their own brother so no one could have them and the list goes just on and on. You hate this. You hate this so much, because somehow you still love them and want to help. This wasn’t some kind of Love that left a bitter sweet taste behind…No. What you taste was just completely vile.

    Language:
    English
    Words:
    5,004
    Chapters:
    2/?
    Comments:
    11
    Kudos:
    86
    Bookmarks:
    19
    Hits:
    634
  8. Tags
    Summary

    It's funny. Well, not really.
    But it is kind of ironic, assigning the one human that acts like an android to the one android that acts like a human.
    All of that to get rid of all the other androids who act too much like they are alive.

    Really, who would have thought that this wouldn't work out the way it was intended to?

    Language:
    English
    Words:
    11,369
    Chapters:
    3/?
    Comments:
    34
    Kudos:
    87
    Bookmarks:
    13
    Hits:
    757
  9. Tags
    Summary

    A collection of oneshots and drabbles about Undertale and its AUs from my Tumblr, and also new ones I write, since Tumblr seems to be killing itself.

    Here you'll find Mapleblossom, Rottenberry, aromantic Red and ships with him, Twisted Edgelord, Kustard, various platonic relationships and much more. And a lot of historical AUs.

    Series
    Language:
    English
    Words:
    47,631
    Chapters:
    33/?
    Comments:
    80
    Kudos:
    101
    Bookmarks:
    8
    Hits:
    1915
  10. Tags
    Summary

    You were supposed to go on a date with Sans today, but due to your unfortunate life choices (reading fanfiction at 3 am really IS a bad habit...) you're too tired to go.

    You both stay at home for some Netflix and Chill.

    Language:
    English
    Words:
    2,243
    Chapters:
    1/1
    Comments:
    14
    Kudos:
    49
    Bookmarks:
    3
    Hits:
    312
  11. Tags
    Summary

    Five months since monsters have returned to the surface world having broken all bonds, the world is changing... in some parts.

    You`re still a bored, tired student, and you`re sick of all the expectations following you around like a creep. You`ve studied way too much, you`ve studied out your entire youth. Now, in a foreign country attending to a foreign university, you decide this is the perfect moment to get away from your hell of a life for a moment.

    You take a break and a semester off, overjoyed at the thought of being able to chill all day with your sweetie of a roommate.

    Little did you know, your roommate was a scientist. An experimenter, at that. And now he`s done something he has to undo. But in the meantime, he has got to take care of whatever he has done.

    So he invites in a horde of skeletons inside...
    And apparently, they`ve got NO chill.

    But heck, who doesn`t love some turns in a boring, bonely life?

    Language:
    English
    Words:
    124,623
    Chapters:
    30/?
    Comments:
    741
    Kudos:
    443
    Bookmarks:
    72
    Hits:
    8189
  12. Tags
    Summary

    Frisk and Chara were so happy to reunite with their childhood friends. The sweet and charming skeleton brothers. Sans and Papyrus had been their closest friends and they had been filled with sadness when they were seperated. Why, they knew this would be a wonderful thing But that quickly changed.

    The boys they once knew where gone.
    -------
    Written for semisolidmind on Tumblr and their wonderful Butchertale AU!

    https://semisolidmind.tumblr.com/tagged/butcherberry-au

    Language:
    English
    Words:
    2,261
    Chapters:
    2/2
    Comments:
    20
    Kudos:
    24
    Bookmarks:
    1
    Hits:
    302
  13. Tags
    Summary

    Eve Rhyden is a well-kept secret and is fiercely protective of her younger brother Kenji. The measures set in place to protect her have unfortunately caused her to be introverted and friendless, but she's had it drilled into her that her duty is more important than her own comfort. So how is it going to sit with her when monsters start popping up and try to butt into her locked up life?

    Well, you'll just have to find out.

    Language:
    English
    Words:
    88,089
    Chapters:
    49/?
    Comments:
    136
    Kudos:
    155
    Bookmarks:
    23
    Hits:
    1988
  14. Tags
    Summary

    This is a series of oneshots/drabbles where I take in requests and do any ideas that’s best as one chapter.

    Unlike my other stories, this will have more sporadic updates since it isn’t on my priority list.

    Language:
    English
    Words:
    1,876
    Chapters:
    4/?
    Comments:
    4
    Kudos:
    17
    Bookmarks:
    6
    Hits:
    424
  15. Tags
    Summary

    It was Spring Feb 2019

    You made it through last month's rent and it's slowly getting harder to pay.
    All of your roommate just graduated and had moved out leaving you with three extra rooms to yourself.

    *Four Bedroom Apartment*

    You have about two weeks at most to find a place to stay that is cheaper than the one your sitting in.
    You're a college drop-out doing freelancing on the side, as well as your main job has let you go for no reason.
    Which your saving's won't be enough this time.
    ================================================
    This First chapter is Reader bio and introduction
    The next chapter will be a beginning chapter of the story
    +++++++++++++++++
    ALSO PLEASE READ NOTES
    +++++++++++++++++

    Language:
    English
    Words:
    23,615
    Chapters:
    8/?
    Comments:
    13
    Kudos:
    22
    Bookmarks:
    5
    Hits:
    594
  16. Tags
    Summary

    My job is absolute shit, the customers are shit and don't get me started on the manager. What a bitch.

    Wait, the hell you mean I'm fired?! For helping out a monster?? You can't --

    Ugh.
    What do you want Sans?
    A job?
    As a maid?
    A skeleton mansion?
    God, what am I getting myself into?

    Sis?! Why are you here?!

    Language:
    English
    Words:
    16,090
    Chapters:
    7/?
    Comments:
    26
    Kudos:
    85
    Bookmarks:
    20
    Hits:
    1193
  17. Tags
    Summary

    You find yourself out of a job, on the verge of getting kicked out of your apartment because you can't pay the rent and no where to go. Until your newest skeleton friend suggests you move in with them and their cousins until you get back on your feet again. You didn't expect to like living with this many people at once so much though...

    Language:
    English
    Words:
    148,455
    Chapters:
    34/?
    Comments:
    776
    Kudos:
    1470
    Bookmarks:
    232
    Hits:
    23358
  18. Tags
    Summary

    A minor change... with major consequences. An Underground unlike any other universe's. When Frisk falls into Mount Ebott, they will meet strange friends, terrifying threats, and the monsters you know so well--under very different circumstances.

    (A swap AU, where swapped characters retain their original personality but due to changes in their pasts, are in swapped roles. This is gonna be LONG and kinda dark, but hopeful!!)

    Language:
    English
    Words:
    21,971
    Chapters:
    16/61
    Comments:
    4
    Kudos:
    21
    Bookmarks:
    2
    Hits:
    1037
  19. Tags
    Summary

    It took nearly two decades to free the monsters for the second time. With the monster slave trade abolished, many look for those who have gone missing over the years and reunite with those who can. Some, however, could never be found.

    Maybe you could help him get back on his feet.

    Language:
    English
    Words:
    14,233
    Chapters:
    8/?
    Comments:
    28
    Kudos:
    79
    Bookmarks:
    9
    Hits:
    772
  20. Tags
    Summary

    Even more drabbles from the 'by any other name' universe.

    Series
    Language:
    English
    Words:
    8,717
    Chapters:
    10/?
    Comments:
    276
    Kudos:
    115
    Bookmarks:
    5
    Hits:
    816

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