1 - 20 of 2564 Works in Alternate Universe - Underswap (Undertale)

Pages Navigation

Listing Works

  1. Tags
    Summary

    Four AU’s have come to a happy ending on the surface. It is a new beginning for everyone, but Berry is haunted by his past that still clings to him and threatens to pull him back into the darkness, unknown to his now growing skeleton family. The newest skeletons are from the last set that surfaced: Fellswap. They are not going to let Berry be taken. Howl and Daemon, the two newest skeletons, have to dig into a horrible truth and show the world Berry’s past, and with the help of their fellow skeletons, they hope to make a better future for him and all other monsters.

    This is adapted from a role play with GetMcDunkedOn and me (Diyami). I hope you enjoy it.

    Series
    Language:
    English
    Words:
    174,289
    Chapters:
    27/?
    Comments:
    439
    Kudos:
    181
    Bookmarks:
    35
    Hits:
    5425
  2. Tags
    Summary

    With war raging on the surface, (Red) and (Fell) struggle every day just to get by. Their Underground is violent and in the midst of a famine. The brothers have their own family drama to deal with, like the daily trauma left by that maniac scientist and the mental scars left on them even in their adult life. (Red's) self-worth is so low he is satisfied selling himself to strangers and (Fell) would do anything, even risk his life in Asgores army, to try to make a change. To try to make life better for them...

    ...And then Stretch casually opens up their Au. And nopes out.

    A slow-slowburn HoneyMustard fic :') Thanks for reading.

    Series
    Language:
    English
    Words:
    40,047
    Chapters:
    17/?
    Comments:
    79
    Kudos:
    91
    Bookmarks:
    24
    Hits:
    1234
  3. 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:
    26,625
    Chapters:
    30/?
    Comments:
    540
    Kudos:
    227
    Bookmarks:
    48
    Hits:
    5176
  4. Tags
    Summary

    You get caught in a web of lies, trapped in a house with six skeletons who'd be more than happy to erase your very existence off the earth. Will you be able to turn their way of thinking around? Get them back to how they were before their 'datemate' came along?

    Maybe.
    Maybe not.

    ((UPDATES EVERY 2-6 DAYS.))

    Language:
    English
    Words:
    12,432
    Chapters:
    5/?
    Comments:
    31
    Kudos:
    63
    Bookmarks:
    17
    Hits:
    707
  5. Tags
    Summary

    You’ve always been a lone wolf, a restless drifter, a Bohemian who refuses to settle down. It might have something to do with the fact that you’re not quite human - you look like one well enough, but outward appearances have never helped you completely fit in with regular society.

    Even if nobody discovers your lifelong secret, that you’re able to become a bobcat at will, they still reject you. They always reject you. Thus, since running away from home years ago, you’ve been mostly on your own, wandering free...

    Until one fateful evening you're taken in by a household of skeleton monsters, and your carefree existence is changed forever, becoming irrevocably tangled up in their complicated lives - for better or worse.

    Series
    Language:
    English
    Words:
    16,991
    Chapters:
    4/34
    Comments:
    7
    Kudos:
    39
    Bookmarks:
    10
    Hits:
    330
  6. Tags
    Summary

    In your previous life, you were just trying to get through your life – whether it was juggling work and college or surviving an encounter with one of your cousins' skeleton boyfriends.

    All alone.

    Somehow, you're taken back to a year before everything changed. What happened? You don't have a clear memory. One thing is certain though, you weren't going to waste this second chance at life.

    You weren't going to live with your cousin, you weren't going to take crap from anyone anymore, and you certainly weren't going to get involved in the lives of those awful skeletons.

    … So why the HELL are they popping into your new life?!

    Language:
    English
    Words:
    30,468
    Chapters:
    8/?
    Comments:
    459
    Kudos:
    851
    Bookmarks:
    207
    Hits:
    11268
  7. Tags
    Summary

    In a world twisted far beyond any RESET’s repair, you have found yourself a home with the sweetest (and scariest) skeletons in the entire underground.

    What if something were to rip you away from them?

    What if it brought you into an entirely new universe where you aren’t at all welcome?

    What if it had a harem of dangerous skeletons at their beck and call?

    What if it had your face?

    Language:
    English
    Words:
    17,732
    Chapters:
    6/?
    Comments:
    112
    Kudos:
    256
    Bookmarks:
    63
    Hits:
    2878
  8. Tags
    Summary

    Edge and his daughters live a regular, quiet life in the city. Surely nothing from his mysterious past could come back to haunt them?

    Language:
    English
    Words:
    5,070
    Chapters:
    3/?
    Comments:
    6
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    47
  9. Tags
    Summary

    Undertale stuff, though most are just based on personal interpretations throughout friends and I. Or ideas bounced off of each other.

    Series
    Language:
    English
    Words:
    916
    Chapters:
    2/?
    Kudos:
    5
    Hits:
    86
  10. Tags
    Summary

    Two part one shot.
    A pair of swap bitties found you and the little blue is sure you're their new family despite your best effort to remind him you'll find them a better family.
    As the week has left you drained, your body forcing you to rest a little longer, the little blue took matters in his own hands, the following events sent you and his brother into a panic, as the bundle of energy gets hurt.

    Language:
    English
    Words:
    3,629
    Chapters:
    2/2
    Comments:
    5
    Kudos:
    30
    Bookmarks:
    5
    Hits:
    288
  11. Tags
    Summary

    Sometimes, you liked to imagine that Frisk was this kind and sweet because of you. That, maybe, you had lived up to your promise of being the best sister you could be when they were first born. ...That you taking the brunt force of your abusive father’s hits and drunk mother’s curses was worth it.
    You had protected them from the reality of your family and… you knew that you had to protect them now.
    You were Determined… To stay Kind.

    Arc 1, Chapters 1-18: "Main Game"
    Arc 2, One Shots 19-22: "True End"
    Arc 3, Entries 23-36: "Epilogue" -- You and your kid sibling, Frisk, freed monster kind over 10 years ago. Everything couldn't be more perfect and all you wanted to do was settle down. That is until you realize you can't remember the last 10 years of your life. Things go to chaos quickly as your memory and sanity start to slip. The only monster who seems able to help you is a man that no one can see or hear, but you. A man named W. D. Gaster.
    Arc 4, Episodes 37-??: "Prologue" --

    Language:
    English
    Words:
    172,852
    Chapters:
    34/?
    Comments:
    256
    Kudos:
    1037
    Bookmarks:
    189
    Hits:
    16442
  12. Tags
    Summary

    You can't remember your past.

    Just little glimpses of a life that you used to live, now lost along the glitched and destroyed coding of a time when everything was falling apart.

    Even if you don't remember it, you can still feel it.

    The mismatched electrostatic that filled your soul with such dread and terror. Demanding you to never stop dancing this destructive dance.

    It's why you were created, why you exist. Fulfilling a cycle of balance that you can never escape.

    You are Destruction, and Destruction is you.

    That's all there is to it, and that's all there will ever be of you.

     

    PART 1: Irresolute Inceptions
    PART 2: Ameliorating Deliriums
    PART 3: Fabricating Eradications and Pugnacious Incubus

    Series
    Language:
    English
    Words:
    54,705
    Chapters:
    15/?
    Comments:
    237
    Kudos:
    290
    Bookmarks:
    66
    Hits:
    4623
  13. Tags
    Summary

    (Y/n) gets super concerned over the disappearance of her best friend, Ashlyn. Ashlyn had gone insane after she downloaded a really shady game. (Y/n) is told by the game(?) to go to Ashlyn's apartment, and it is revealed that Ashlyn has been sucked into the game. The sensible thing to do is look for outside intervention, but (Y/n) isn't really known for her good decision-making skills.

    The game "Beautiful Soul Redemption" is a dating sim where the hero romances many Skeletons. Sadly, (Y/n) is not the protagonist; she's the antagonist. That doesn't mean that she can't smooch skeletons if she really wants to; it just means that every little thing will be TEN TIMES HARDER. But that won't stop (Y/n). Because if she stops, that means that she dies in the real world too.

    Yay, Ultimatums!

    For her to escape, she has to redeem the souls already trapped in the game. The more souls she saves, the more her soul gets redeemed too. Her actions affect everyone and everything, and yet it feels like everything is out of her control. A conflicting feeling, isn't it.

    Language:
    English
    Words:
    2,631
    Chapters:
    1/80
    Comments:
    6
    Kudos:
    19
    Bookmarks:
    5
    Hits:
    137
  14. Tags
    Language:
    English
    Words:
    3,764
    Chapters:
    3/?
    Comments:
    7
    Kudos:
    65
    Bookmarks:
    14
    Hits:
    535
  15. Tags
    Summary

    The skies used to be ours. To fly on dark wings around the world. That was until humans got greedy. They no longer wanted to be land bound. They wanted a taste of the sky.

    So they hunted as like common prey. Killing our young, our old and everyone inbetween. They took our knowledge of the skies, our homes, all while erasing our existence from the history books.

    Now not even the monsters remember us.

    Language:
    English
    Words:
    4,618
    Chapters:
    3/?
    Comments:
    22
    Kudos:
    127
    Bookmarks:
    29
    Hits:
    616
  16. Tags
    Summary

    [[The Swap AU no one asked for. But it isn't a swap Au. It's what happened]]

     

    Tommy originally pressed the button of the Final Controll room first, but no one noticed.
    Well, what if they did. What if Eret decided to shut up about everything. Tried to prevent the mistake from happening? Nothing good.

    In here we speedrun the existence of L'Manberg and the mental health of so many people

    Language:
    English
    Words:
    2,098
    Chapters:
    1/?
    Comments:
    4
    Kudos:
    27
    Bookmarks:
    4
    Hits:
    215
  17. Tags
    Summary

    Blue knows a lot more than he lets on. He sees how Papyrus is aching. If only Undyne could see it too.

    Language:
    English
    Words:
    555
    Chapters:
    1/1
    Kudos:
    19
    Bookmarks:
    1
    Hits:
    32
  18. Tags
    Summary

    You have lived as Undeswap Sans for years. You know how you're supposed to act and what you're supposed to do when the human comes by, you even made a script, and you follow it like your life depends on it.

    But this is wrong, nothing is going according to plan and you don't know what to do. How long will it take before you snap? Time to find out

    Series
    Language:
    English
    Words:
    1,727
    Chapters:
    1/?
    Kudos:
    18
    Bookmarks:
    5
    Hits:
    57
  19. Tags
    Summary

    I bring you the area where I will put everything that is short and mini-chapters.

    Different topics that I like but i don't have the time to create a long fic…
    I will try more different topics here and even i will try to make new ones.

    I will add a lot of names from other authors here since my mainly idea is to help other people find ideas and create their own stuff.

    This area is for one shots, I think people calls them like that?
    Unrelated stories that have only 1 chapter or 2 if i make a pov from Sans.

    And also i will add the first chapter of long stories here to make you feel the boom of a new story beginning.

    That way you'll never miss one of my new fics and you will learn from yourself if you like the story or not.

    I accept ideas and suggestion. (Inside my possibilities and own likes)

    Language:
    English
    Words:
    11,452
    Chapters:
    4/?
    Comments:
    15
    Kudos:
    24
    Bookmarks:
    5
    Hits:
    361
  20. Tags
    Summary

    Based off of @ToonNaughty 's Stutterberry egg post of Twitter. Fun stuff.

    Bitty Blue and Y/n have fun with boba pearls. (That's what they're called! I know right?)

    Language:
    English
    Words:
    1,609
    Chapters:
    2/2
    Comments:
    7
    Kudos:
    51
    Bookmarks:
    6
    Hits:
    469

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