1 - 20 of 1290 Works in Alternate Universe - Underswap

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  1. Tags
    Summary

    A night out with your roommates' sorority sounded like a good way to wind down from exams season, but your good intentions to keep from ruining someone's nice carpet have you end up in the middle of the forest. In the middle of the night. Very, very drunk.

    Good thing you found a random house to sidle up to and ask to use their phone. Less of a good thing that the skeleton monster that lives in it is only placated by your sloppy jokes.

    -

    Eventually going to culminate in a "Six Skeletons" sort of set-up, but you don't get off as easy by knowing Classic Sans first.

    Language:
    English
    Words:
    82,331
    Chapters:
    19/?
    Comments:
    420
    Kudos:
    1016
    Bookmarks:
    176
    Hits:
    11910
  2. Tags
    Summary

    You're in a gang situated near Ebbot City, and you live for the violence. You're not without your morals, they're just... flexible. But when one of your monster friends invites you to Grillbys, they might have accidentally brought you into a world of trouble.

    Featuring friendly amalgamates, drama, high tensions, and traumatized skeletons, what will you do as your list of people to protect grows far faster than you ever expected?

    Series
    Language:
    English
    Words:
    26,258
    Chapters:
    12/?
    Comments:
    93
    Kudos:
    149
    Bookmarks:
    28
    Hits:
    1457
  3. Tags
    Summary

    This is an ongoing interactive event on my Tumblr where my followers get to choose what happens in the story. The story revolves around securing dates (and maybe a kiss) from a skeleton or a Snowdin bartender in the chosen AU. The entire work will span multiple rounds of Undertale or AU visits and does have an overall plot.

    Language:
    English
    Words:
    4,827
    Chapters:
    8/?
    Kudos:
    2
    Hits:
    35
  4. Tags
    Summary

    For the Pregnant Papyrus fic comp currently being run on @Cooterblaster's tumblr!
    I've been a huge but shy fan of their work for a while so i'm super psyched to share this :D
    Using the prompt: On the day of their wedding.
    Hope you enjoy! <3

    Language:
    English
    Words:
    4,498
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    20
    Bookmarks:
    1
    Hits:
    124
  5. Tags
    Summary

    Swirlby and Papyrus decide to engage in a little hypnosis play.

    Language:
    English
    Words:
    3,480
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    4
    Hits:
    78
  6. Tags
    Summary

    All that matters is the truth and the truth is, Edge is going to kill that fucking dog.

    Language:
    English
    Words:
    1,839
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    26
    Bookmarks:
    5
    Hits:
    91
  7. Tags
    Summary

    It's been years since the barrier fell down and monsters made their way back into society. Now that it's spring love could be in the air for a young succubus. One day she meets and eventually saves a young Skeleton that works in the flower shop she frequently visits.Their friendship soon becomes love, but can a succubus, a temptress of the night, really find herself mated to a hyperactive and innocent skeleton like Sans? Read to find out.

    Series
    Language:
    English
    Words:
    37,031
    Chapters:
    19/?
    Comments:
    75
    Kudos:
    252
    Bookmarks:
    48
    Hits:
    4598
  8. 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:
    3,324
    Chapters:
    1/?
    Comments:
    7
    Kudos:
    44
    Bookmarks:
    9
    Hits:
    228
  9. Tags
    Summary

    Monsters returning to the surface was just another reason to avoid leaving the apartment besides your sometimes crippling social anxiety. But even a recluse who often slept through normal breakfast hours and forgot to eat lunch ran out of milk and toilet paper.

    Language:
    English
    Words:
    25,074
    Chapters:
    10/?
    Comments:
    155
    Kudos:
    323
    Bookmarks:
    55
    Hits:
    3026
  10. Tags
    Summary

    You don't need help, you don't want help. You're sick of life, and you're trying to off yourself. Sucks that some real monsters are gonna do their damnedest to change your mind. Heavy trigger warning, for future use.

    Language:
    English
    Words:
    115,324
    Chapters:
    21/?
    Comments:
    128
    Kudos:
    381
    Bookmarks:
    58
    Hits:
    5930
  11. Tags
    Summary

    The first time you met monsters you manage to run into four of them and literally run into one of those four. Now they are apparently moving in next door with their siblings and you can't seem to imagine a life without monsters. On the plus side they tell horrible jokes and have endless amounts of energy. So what could possibly go wrong.

    Language:
    English
    Words:
    149,967
    Chapters:
    40/?
    Comments:
    1159
    Kudos:
    2101
    Bookmarks:
    267
    Hits:
    39099
  12. Tags
    Summary

    Something unexpected has happened. The skeleton brothers from Swapfell arrive in the Underswap universe and Sans (Blue) makes it his mission to save Razz (Swapfell Sans) from his wicked (and abusive) ways or die trying! Probably the latter. Maybe he should settle for just getting him to treat Slim better? No! He will not give up! Everyone can be a good person if they just try, right?

     

    Series
    Language:
    English
    Words:
    74,988
    Chapters:
    15/?
    Comments:
    90
    Kudos:
    154
    Bookmarks:
    12
    Hits:
    2184
  13. Tags
    Summary

    It would have been easier for Edge to bear if there had been someone to blame.

     

    There were any number of reasons that Edge and Red were currently stuck in Underswap. Fate, bad timing, the maliciousness of the universe...shitty luck. All of them and none of them were reason enough and really, it wouldn't have been so bad if Edge could stand his counterpart, Stretch.

    Language:
    English
    Words:
    31,998
    Chapters:
    9/?
    Comments:
    113
    Kudos:
    138
    Bookmarks:
    23
    Hits:
    1540
  14. Tags
    Summary

    Life hasn't always been easy for you but you're in a great place now: you work for your uncle as a master mechanic, you live with your best friend Frisk (and Sans basically lives there, too), and you might work up the courage to tell your crush how you feel soon (he is a pretty hot bartender, after all). Monsters have been on the surface for over half of your life - you even got your mechanic certification with Asriel Dreemurr - and you can't imagine life without them now.

    But of course, where monsters are involved, life is anything but normal. One in particular is hellbent on making your life miserable. You try to stay upbeat even as you're dragged through multiple universes where everything is just...a bit...altered. At least you see some familiar faces, right? Right????

    Planned M/W/F update schedule.

    Series
    Language:
    English
    Words:
    39,199
    Chapters:
    29/?
    Comments:
    160
    Kudos:
    97
    Bookmarks:
    15
    Hits:
    2077
  15. Tags
    Summary

    Undertale AU Garbage. LOVE, love, smut, angst, edginess, and self reflection. A story about teamwork and friendship, with lots of puns, ships, and feels. Full of head-canons what might deviate from the original story and/or AU ideas.

    Worlds collide when shortcuts resonate. Will they be able to find their way home?

    Series
    Language:
    English
    Words:
    222,823
    Chapters:
    50/?
    Comments:
    841
    Kudos:
    406
    Bookmarks:
    51
    Hits:
    9115
  16. Tags
    Summary

    Stretch freaks out while preparing for his first date with Edge

    Language:
    English
    Words:
    1,323
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    12
    Bookmarks:
    1
    Hits:
    59
  17. Tags
    Summary

    Blue lived a happy and carefree life as the second son of the king, not having to worry about the throne or keeping up his reputation as everyone seemed to adore the young prince. He hoped and trained to become a knight, having his heart set on it for as long as he can remember.
    Unfortunately, his father had different plans for him.
    Now that he has turned 18 he's about to learn the harsh reality of being a royal.

    Language:
    English
    Words:
    4,263
    Chapters:
    5/?
    Comments:
    2
    Kudos:
    21
    Hits:
    338
  18. Tags
    Summary

    Have some Error Oneshots to either warm your heart and make you smile or clench your SOUL and make you cry!

    Language:
    English
    Words:
    5,073
    Chapters:
    3/?
    Comments:
    1
    Kudos:
    20
    Bookmarks:
    1
    Hits:
    174
  19. Tags
    Summary

    After a weird fight with Ink, error ends up in Underswap during a genocide run. Due to his code, he becomes a part of UNderswap himself and becomes the younger brother of Blueberry and Stretch. The two must teach him the ways of the world and how to be a sans again, even if it means serious setbacks along the way.

    (Big brothers stretch and Blueberry with Baby brother Error AU.)

    Series
    Language:
    English
    Words:
    6,683
    Chapters:
    3/?
    Comments:
    40
    Kudos:
    74
    Bookmarks:
    5
    Hits:
    527
  20. Tags
    Summary

    Monsters. They'd surfaced about a year ago, and you were determined to make a difference in how they were treated. You just didn't expect the first monster you met to be a total asshole. Still, you weren't going to let one lanky skeleton deter you from your goal. You were going to befriend him, you were d e t e r m i n e d.

    Language:
    English
    Words:
    7,131
    Chapters:
    5/?
    Comments:
    11
    Kudos:
    50
    Bookmarks:
    2
    Hits:
    391

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