1 - 20 of 2030 Works in Alternate Universe - Underfell

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  1. Tags
    Summary

    Sans tries to go back in time to before his brother is killed. He ends up in the Underfell universe and bites off a lot more than he can chew. Can Underfell Papyrus help him back home or will he be stuck in this awful world forever?

    Notes:
    Noncon/dubcon warnings do not apply to any fontcest relationship.
    If you wish to skip the rape scene in this fic, you can skip chapter 3. However, the rest of the fic heavily references this chapter as this is a rape recovery longfic.
    Please read the warnings in the notes section of each chapter.

    Language:
    English
    Words:
    103,656
    Chapters:
    20/?
    Collections:
    2
    Comments:
    377
    Kudos:
    563
    Bookmarks:
    82
    Hits:
    8905
  2. Tags
    Summary

    Instead, she scrolled up to the point where she was in her martial art tournament Determined to win. Where she didn’t win for the sake of a desperate stranger, it was the point where she had been noticed by the MageScientists.

    ‘It was where it all began.’

    Kia reached out and made her decision grimly.

    Loading…

    Series
    Language:
    English
    Words:
    7,027
    Chapters:
    3/?
    Kudos:
    1
    Hits:
    18
  3. Tags
    Summary

    One evening spent in the storm can change everything. Especially when the big bad and scary skeleton finds himself in the middle of it and calls you for help.

    Character development focused Edge's POV story with a spoonful of Reader insert.

    Series
    Language:
    English
    Words:
    175,830
    Chapters:
    26/?
    Comments:
    867
    Kudos:
    1083
    Bookmarks:
    162
    Hits:
    12224
  4. Tags
    Summary

    After dozens of rejections, Red finally gets a call back from Ketchup! He wants to go to dinner and a movie~

    Language:
    English
    Words:
    5,404
    Chapters:
    2/?
    Comments:
    10
    Kudos:
    27
    Bookmarks:
    3
    Hits:
    224
  5. Tags
    Summary

    Everything about her bewitched him, and tonight, there would be no interruptions.

    Inspired by dirtytoxin's art.

    Language:
    English
    Words:
    4,332
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    2
    Bookmarks:
    1
    Hits:
    54
  6. Tags
    Summary

    Stretch is Home Alone while all the other skellies are out diplomating. It's super.

    A prequel to the other stories in this series. You don't have to read the other stories to understand this, but why wouldn't you?

    Series
    Language:
    English
    Words:
    1,466
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    12
    Hits:
    40
  7. Tags
    Summary

    It's the first pride week you've been to, and certainly the first monsters have been allowed to since they got to the surface. It's time for partying, fun, shenanigans, and a whole bunch of skeletons!

    Language:
    English
    Words:
    10,594
    Chapters:
    3/?
    Comments:
    21
    Kudos:
    36
    Bookmarks:
    7
    Hits:
    316
  8. Tags
    Series
    Language:
    English
    Words:
    8,464
    Chapters:
    24/?
    Comments:
    35
    Kudos:
    62
    Bookmarks:
    6
    Hits:
    1284
  9. Tags
    Series
    Language:
    English
    Words:
    9,373
    Chapters:
    22/?
    Comments:
    12
    Kudos:
    19
    Bookmarks:
    3
    Hits:
    310
  10. Tags
    Summary

    Compilation of Fellcest and Fellbros fanfics

    NSFW will be applied to the Title of Chapter with appropriate warnings in the notes.

    Series
    Language:
    English
    Words:
    22,467
    Chapters:
    25/?
    Comments:
    30
    Kudos:
    213
    Bookmarks:
    24
    Hits:
    3599
  11. Tags
    Summary

    Compilation of Kustard fanfics

    NSFW will be applied to the Title of Chapter with appropriate warnings in the notes.

    Series
    Language:
    English
    Words:
    48,177
    Chapters:
    70/?
    Comments:
    193
    Kudos:
    398
    Bookmarks:
    35
    Hits:
    7600
  12. 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:
    155,125
    Chapters:
    41/?
    Comments:
    1168
    Kudos:
    2139
    Bookmarks:
    267
    Hits:
    40015
  13. Tags
    Summary

    (New Summary)

    Undertale? Of course, you’ve heard of it. Who hasn’t heard of that popular video game? You’ve read more fanfics for that game than you can count. You never once considered that it was more than just a game, though. It’s not until you suddenly wake up in the world of Undertale that you realize that the characters are actually real.

    Amazing as this is, you can’t help but be concerned about how you got there. One minute you're walking to class, and the next you're waking up in the snow. And, if appearing in Undertale wasn’t already a big enough shock, you keep AU jumping and ending up in different Undertale-based worlds!

    While you have no problem with meeting the different versions of everybody’s favorite skeletons, you quickly realize something weird is going on in each world you visit. Something that’s causing a lot of trouble and damage. Looks like you won’t be able to go home until you figure this mess out.

    Well, at least you get to befriend some cute skeletons along the way.

    Wait a minute! What the hell is wrong with your soul?!!

    Language:
    English
    Words:
    217,283
    Chapters:
    32/?
    Comments:
    943
    Kudos:
    795
    Bookmarks:
    118
    Hits:
    12136
  14. Tags
    Summary

    You work at a Flower Shop.
    You live a normal routine life, nothing different.
    You run into a couple monsters now and then at work.

    One day you're closing up shop, singing a sweet tune and you waltz right into the Edgy Version of the skeleton we all know and love.

    You help him get laid with a bouquet of flowers.
    Friendship and angst ensues.

    Language:
    English
    Words:
    16,322
    Chapters:
    7/?
    Comments:
    110
    Kudos:
    231
    Bookmarks:
    33
    Hits:
    3168
  15. Tags
    Summary

    Monsters came up from the underground a while ago, and are now a part of daily life. That doesn’t mean they have it easy, however. Coming up from the harsh life underground lead to another harsh life on the surface, where multiple groups of monsters have created a crime syndicate to rival the human ones that were already there.

    And then there’s you. You are a singer who works at a little whole-in-the-wall bar. You don’t have anything to do with the mafia, and are just trying to pay your bills. But of course, things don’t always go the way you want them to.

    Language:
    English
    Words:
    41,035
    Chapters:
    18/?
    Comments:
    214
    Kudos:
    399
    Bookmarks:
    67
    Hits:
    4952
  16. Tags
    Summary

    Dream (of Dreamtale) is hoasting a tea party! And he's invited some "friends"

    Language:
    English
    Words:
    897
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    1
    Hits:
    9
  17. Tags
    Summary

    A collection of my headcanons for how different Undertale AUs work.

    Language:
    English
    Words:
    8,119
    Chapters:
    2/?
    Comments:
    24
    Kudos:
    14
    Bookmarks:
    2
    Hits:
    108
  18. Tags
    Summary

    Side stories set in the same world as The World, Upside Down, highly recommend reading that before this. Tales of Frisk's life before and after coming to this new world, of the lives of monsters before Frisk arrived, and some from the lives of others in another world as well. UPDATES FREQUENTLY

    Series
    Language:
    English
    Words:
    239,582
    Chapters:
    43/?
    Comments:
    232
    Kudos:
    131
    Bookmarks:
    18
    Hits:
    3474
  19. 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:
    237,832
    Chapters:
    54/?
    Comments:
    912
    Kudos:
    449
    Bookmarks:
    53
    Hits:
    10000
  20. Tags
    Summary

    A series of oneshots, wherein a lucky character gets all the skeleton she can handle. And then some.

    Language:
    English
    Words:
    2,498
    Chapters:
    1/?
    Kudos:
    2
    Hits:
    17

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