1 - 20 of 1339 Works in Alternate Universe - Underswap (Undertale)

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  1. Tags
    Summary

    A series of four vignettes for four changed heroes, exploring their lives, their journeys, and their fears.

    Set in the Deltashuffle AU, which rotates the roles of the main four and various side characters.

    Language:
    English
    Words:
    1,421
    Chapters:
    1/1
    Kudos:
    17
    Bookmarks:
    2
    Hits:
    159
  2. 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:
    4,398
    Chapters:
    5/?
    Comments:
    4
    Kudos:
    17
    Bookmarks:
    2
    Hits:
    158
  3. Tags
    Summary

    A series of Holiday stories and drabbles.

    Stretch likes it when Edge takes a detour off the daily routine beaten path. He really likes it.

    Series
    Language:
    English
    Words:
    5,003
    Chapters:
    5/?
    Comments:
    63
    Kudos:
    66
    Bookmarks:
    4
    Hits:
    386
  4. Tags
    Summary

    Papyrus is just trying to get through his day in the human world. He's lost about everything he could possibly lose, and the only thing keeping him going are the memories of his brother. Humans gave mercy after finding out what occurred underground, and monsters don't have to suffer as they once did. Papyrus is just going to have to get use to things, well... until he ran into her.

    Literally.

    Language:
    English
    Words:
    4,970
    Chapters:
    3/?
    Comments:
    12
    Kudos:
    34
    Bookmarks:
    4
    Hits:
    326
  5. Tags
    Summary

    My oh my, friends~ It's December and we are really in the seasonal mood! Every day we'll post a new lovely little fluffy chapter! What could go wrong?

    Language:
    English
    Words:
    20,343
    Chapters:
    9/31
    Comments:
    3
    Kudos:
    8
    Hits:
    258
  6. Tags
    Summary

    Papyrus finds you when you have nowhere to go. Now you live with eight skeletons. You don’t mind this arrangement.

    Most of the time.

    Series
    Language:
    English
    Words:
    83,214
    Chapters:
    38/?
    Comments:
    702
    Kudos:
    768
    Bookmarks:
    132
    Hits:
    14313
  7. Tags
    Summary

    6 skeletons (maybe more) wake up on an island with no memory of how they got there. As they explore the island, they realize two things, they can't use their teleportation magic, and they aren't alone.

    Language:
    English
    Words:
    23,314
    Chapters:
    15/?
    Comments:
    64
    Kudos:
    116
    Bookmarks:
    17
    Hits:
    2211
  8. Tags
    Summary

    Ah yes, Cherryberry, my OTP. So, of course I'm going to ruin it for everyone by writing this bullshit.

    I do have things for this ship that I actually put effort into over here, so maybe look at that if I've scared you away from the ship with this. I promise it’s a good ship, no- wait- where are you going?!

    None of these are at all canon to my version/story of their ship, thankfully. However, just to make this more interesting, imagine this is all happening in the same timeline. Petition to make a new series of AUs called Cracktale, Crackswap, Crackfell, Crackswell...

    Series
    Language:
    English
    Words:
    7,692
    Chapters:
    7/?
    Comments:
    7
    Kudos:
    13
    Hits:
    331
  9. Tags
    Summary

    Edge time travels and comes face-to-face with his older brother Red as a child. What can he possibly say to a child trapped in Underfell?

    Language:
    English
    Words:
    4,724
    Chapters:
    1/1
    Comments:
    8
    Kudos:
    78
    Bookmarks:
    15
    Hits:
    322
  10. Tags
    Summary

    Hell’s Studio’s Sammy Lawrence finds himself in the dangerous of the canon studio, no sign of the one he knows in sight.

    Good thing Henry needs all the help he can get.

    Spin-off of sorts of this fic: here

    Language:
    English
    Words:
    35,972
    Chapters:
    15/?
    Comments:
    63
    Kudos:
    177
    Bookmarks:
    18
    Hits:
    2029
  11. Tags
    Summary

    You moved into a mansion. Very nice. However, what you didn't know is that your parents would FUCKING LEAVE. You were only a 12 year old! How would you survive? Well, you could, you were just being dramatic. One morning, you decide to make pancakes. When you discover you have no sugar, you venture to your neighbors house, to borrow some. Little did you know, for a cup of sugar, you'd make so many entertaining friends.

    And maybe an enemy.

    (CHILD READER)
    (NO SMUT; ONLY FLUFF)
    (NO INTENDED PEDOPHILIA)
    (REMAKE OF AN OLD STORY)

    Language:
    English
    Words:
    2,543
    Chapters:
    1/?
    Comments:
    6
    Kudos:
    18
    Hits:
    114
  12. Tags
    Summary

    'tis the season...

    Series
    Language:
    English
    Words:
    3,670
    Chapters:
    2/?
    Comments:
    26
    Kudos:
    53
    Bookmarks:
    5
    Hits:
    223
  13. 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:
    119,969
    Chapters:
    29/?
    Comments:
    590
    Kudos:
    1145
    Bookmarks:
    189
    Hits:
    17589
  14. Tags
    Summary

    "please, I can't lose another person who is important to me..."

    "I'm important to you?"

    "Of course!"

    When you love someone, the best thing is to let them go. Even if it causes your soul to shatter into millions of pieces. Sans and Blue are about to discover, just because your soul is broken, doesn't mean it can't be fixed as they find love in the most unlikely place.

    Language:
    English
    Words:
    40,548
    Chapters:
    24/?
    Comments:
    229
    Kudos:
    277
    Bookmarks:
    21
    Hits:
    3112
  15. Tags
    Summary

    Cherryberry, quite the unappreciated ship, which is pretty crushing for me considering I am absolutely obsessed with it and it's my ultimate OTP. Well, I seek to change that, as much as I can, at least, with some silly little fanficitons. Is it porn? Probably. Is it terrible? Most definitely.

    These all take place in a larger fic with an actual plot that will eventually be posted, but it's just one giant WIP right now.

    Language:
    English
    Words:
    123,522
    Chapters:
    29/?
    Comments:
    96
    Kudos:
    57
    Bookmarks:
    6
    Hits:
    1725
  16. Tags
    Summary

    When monsters first leave Mt. Ebbot, Alanna isn't that concerned. She has her dream bakery to run after all, and she has more then enough social slip ups without being stuck in a crowd of people. When she hires a purple spider monster named Muffet however, she quickly falls in with a crowd of monsters that don't seem to mind her oddities.

    That doesn't mean she's trusting them with her autism though. Still, maybe slowing down and relaxing with a certain skeleton monster isn't all bad.

    Language:
    English
    Words:
    5,797
    Chapters:
    3/?
    Comments:
    10
    Kudos:
    66
    Bookmarks:
    18
    Hits:
    429
  17. Tags
    Summary

    After his timeline was destroyed along with almost everyone in it, the Sans who would come to be known as ‘Blue’ had an epiphany.

    Everything sucked. Like, all the time.

    It was not, perhaps, a new discovery, but it was the first time he had admitted it to himself. He had always tried to keep a positive attitude in life, even if his recent circumstances had put a sizable dent in his motivation.

    But still, he wouldn’t give up! As long as there were still monsters out there who could use his help, Blue would never give up.

    And so, stuck traveling the multiverse with a child and stuffed toy that were doing their best to kill him at every turn, Blue attempted to help prevent other universes from meeting the same fate as his - and perhaps make some new friends along the way!

    After all, just because life is hell doesn’t mean that he shouldn’t be cheerful about it!

    (in which Underswap Sans survives a no-mercy timeline unlike any other, and ends up losing both his home and his ability to Be Chill™.)

    Language:
    English
    Words:
    26,962
    Chapters:
    24/60
    Comments:
    146
    Kudos:
    205
    Bookmarks:
    31
    Hits:
    1891
  18. Tags
    Summary

    This fic is a collection of AU one shots about my other fic, The Skeletons and the Damsel. So definitely check that out first, okay? Thanks. Anyway, you can make requests for one shots for this. And if any of them get popular enough, I may write follow-ups to them. :D We'll see. This whole Fic is just being written for fun anyway!

    Series
    Language:
    English
    Words:
    29,475
    Chapters:
    21/?
    Comments:
    116
    Kudos:
    110
    Bookmarks:
    15
    Hits:
    2639
  19. Tags
    Summary

    You're a centuries-old shapeshifter with a tendency to change into cats and house-hop. On one such trip, you suddenly find yourself in the home of a pair of adorable skeleton brothers all-too-willing to shower you with affection.

    Good skeletons.

    Series
    Language:
    English
    Words:
    54,020
    Chapters:
    9/?
    Comments:
    406
    Kudos:
    561
    Bookmarks:
    102
    Hits:
    5529
  20. Tags
    Summary

    You've just gotten out of a rocky relationship. You don't have a single friend.
    And now monsters are real. Great.

    You're a bad person though, you know you deserve whatever life throws at you. You've all but given up, somewhat content in your piece of shit appartment with a job you hate... All until you end up getting a bitty... And another one starts to just... Show up.

    Neither of them are good people either. Guess you can be miserable together.

    Language:
    English
    Words:
    5,621
    Chapters:
    3/?
    Comments:
    34
    Kudos:
    91
    Bookmarks:
    17
    Hits:
    813

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