1 - 20 of 31 Works in Onionsan (Undertale)

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  1. Tags
    Summary

    She was a monster, and she had called you her child. That meant she was your mother, and you were a monster too... right?

    Language:
    English
    Words:
    212,002
    Chapters:
    37/37
    Collections:
    1
    Comments:
    621
    Kudos:
    1133
    Bookmarks:
    218
    Hits:
    25930
  2. Tags
    Summary

    Frisk has freed monster kind from the Underground after so many runs. She is determined to help all her monster friends settle on the Surface. However, she will need to convince humanity to give her friends a chance. For that, she will need some help...

     

    All parts are together in this work!:
    Part 1: A New Beginning (Prologue and Chapters 1-5)
    Part 2: Moving Forward (Chapters 6-10)
    Part 3: Good Times (Chapters 11-15)

    Language:
    English
    Words:
    59,862
    Chapters:
    14/?
    Comments:
    10
    Kudos:
    10
    Hits:
    404
  3. Tags
    Summary

    Long ago, two races ruled over Earth: HUMANS and MONSTERS.

    One day, war broke out between the two races. After a long battle, the humans were victorious. They sealed the monsters underground with a magic spell, hoping to lock them away, forever.

    Legends say that those who climb the mountain never return.

    But what if someone with an unusual amount of DETERMINATION... with a SOUL brighter than most... made the journey?

    Language:
    English
    Words:
    3,140
    Chapters:
    2/?
    Comments:
    2
    Kudos:
    1
    Hits:
    40
  4. Tags
    Summary

    As the title suggest. There's not any rules to be honest, just no smut. If you are triggered by anything at all, check the warnings. They will be put in the notes before each chapter.

    Language:
    English
    Words:
    1,829
    Chapters:
    3/?
    Comments:
    14
    Hits:
    92
  5. Tags
    Summary

    Sex fantasies come alive in this realistic depiction of love in our world and the world below.

    (Originally posted on Fanfiction.net)

    Original Bio: "50 shades of gray for Undertale. (Except way more inappropriate)(I can't believe people actually like this. I was just trolling when I made this. Thanks anyways!)"

    Language:
    English
    Words:
    6,867
    Chapters:
    7/?
    Comments:
    3
    Kudos:
    10
    Hits:
    617
  6. Tags
    Summary

    Two years after the events of the neutral pacifist ending and a new human has come to the Underground.

    But, you are neither a child, nor are you innocent by any stretch of the imagination.

    Who are you? If you're so nice why do you have such an ungodly LV? And what's Frisk going to do?

     

    Edit: Updates will most likely be delayed due to computer destroying the other chapters I had written ahead. Got a lot of catching up to do.

    Language:
    English
    Words:
    77,285
    Chapters:
    19/?
    Comments:
    71
    Kudos:
    95
    Bookmarks:
    12
    Hits:
    1442
  7. Tags
    Summary

    Life in the city was not for you, so you moved out to the more rural part of your country. It was wonderful. That is until the whole world seemed to come to a standstill at the emergence of monsters and you become wrapped up in all of it. It was worth it. Maybe. The short fake ass skeleton gave you your doubts.

    You decide you hate him.

    Language:
    English
    Words:
    4,182
    Chapters:
    3/?
    Collections:
    1
    Comments:
    12
    Kudos:
    35
    Bookmarks:
    5
    Hits:
    241
  8. Tags
    Summary

    20 random words for 20 random moments.

    Language:
    English
    Words:
    1,128
    Chapters:
    1/1
    Kudos:
    20
    Bookmarks:
    1
    Hits:
    161
  9. Tags
    Summary

    Undertale is a popular video game, but it knows when it's being played. Five of its characters can remember the way the world used to be, even after the game itself resets, but until now they have been unable to affect the outcome for the better. As such, this game has never once gotten its happy ending and, as such, is adapting. Two wrongs make only a greater wrong, after all.

    This is No Mercy Route Number Ninety, and five alone will have to change the course of the game, before the game changes them.

    PERMANENTLY INCOMPLETE AS OF 11/14/18

    Language:
    English
    Words:
    255,485
    Chapters:
    39/39
    Comments:
    545
    Kudos:
    648
    Bookmarks:
    73
    Hits:
    13136
  10. Tags
    Summary

    Based off the Amazing World of Gumball episode, ‘The Night’, follow your favourite Undertale characters as, after a long day, they climb into their beds, fluff up their pillows, lay down their heads, and drift off to a magical place.

    The land of dreams: a place not bound by rules or limitations. A world where anything can happen, and where anything is possible. Where the greatest joy and deepest fears can be found. Where fortunes are lost and found every night.

    Where will the dreams of such weird, magical creatures take us? What wondrous, mysterious things will we see?

    The answer lies inside, dear reader.

    Language:
    English
    Words:
    6,149
    Chapters:
    5/?
    Comments:
    20
    Kudos:
    10
    Bookmarks:
    4
    Hits:
    141
  11. Tags
    Series
    Language:
    English
    Words:
    100
    Chapters:
    1/1
    Kudos:
    1
    Hits:
    19
  12. Tags
    Summary

    Side stories for The Skeleton Games Underfell. These aren't required when reading the main story. The barrier of Underfell is broken and the monsters are free. A month later they are allowed into the city. One morning you wake to the sound of your new jerk neighbor playing the loudest and worst music. Wait... you know that game. Time to get back at that jerk. And maybe make friends with him too. You could always use a new gaming buddy. Besides his rage face is so cute.

    Want to read The Skeleton Games

    Language:
    English
    Words:
    8,158
    Chapters:
    2/?
    Comments:
    100
    Kudos:
    620
    Bookmarks:
    87
    Hits:
    11324
  13. Tags
    Summary

    Underswap Sans gets treated a like a Japanese schoolgirl by a tentacle monster in Waterfall.

    Or Underswap Sans enters into a friends with benefits relationship with a tentacle monster in Waterfall. One of those benefits includes breeding.

    Language:
    English
    Words:
    3,891
    Chapters:
    1/1
    Comments:
    19
    Kudos:
    121
    Bookmarks:
    9
    Hits:
    2179
  14. Tags
    Summary

    This is the Undertale game with Tsuna as Frisk.

    I added ever named monster except one, do you know which?

    Language:
    English
    Words:
    45,562
    Chapters:
    11/11
    Comments:
    51
    Kudos:
    151
    Bookmarks:
    33
    Hits:
    2257
  15. Tags
    Summary

    Frisk wakes up in a strange place with monsters and talking flowers. She certain that she's never seen anything like this before yet there's a nagging familiarity she can't quite place, nor can she remember how she got here. As she travels farther forward she will free all these monsters and without hurting anyone. If this world's law is 'kill or be killed' then it's more than time for a new rule. But can she pay the price for their freedom and still have anything left of herself?

    Going to try and do an underfell story that is original but also still feels close to undertale

    Language:
    English
    Words:
    7,089
    Chapters:
    3/?
    Kudos:
    10
    Bookmarks:
    3
    Hits:
    264
  16. Tags
    Summary

    Monsters are dying and there's no clues, no evidence, only dust.

    Straight up horror in this, inspired (dare I say encouraged) by tumblr shenanigans.

    This is DARK, mind the tags. Like, seriously.

    Language:
    English
    Words:
    1,713
    Chapters:
    1/1
    Comments:
    6
    Kudos:
    18
    Bookmarks:
    1
    Hits:
    146
  17. Tags
    Summary

    Toriel and Sans have erotic adventures as they build a life together.

    Language:
    English
    Words:
    60,872
    Chapters:
    11/?
    Comments:
    36
    Kudos:
    53
    Bookmarks:
    7
    Hits:
    2199
  18. Tags
    Summary

    Papyrus loves everyone he's ever met, he thinks.

    Language:
    English
    Words:
    5,307
    Chapters:
    1/1
    Comments:
    8
    Kudos:
    50
    Bookmarks:
    7
    Hits:
    350
  19. Tags
    Summary

    This is a story about the genocide route from Monster Kids POV.

    Language:
    English
    Words:
    2,742
    Chapters:
    5/5
    Comments:
    2
    Kudos:
    12
    Bookmarks:
    1
    Hits:
    141
  20. Tags
    Summary

    Mettaton sets Napstablook up on a blind date. Napstablook is tentative. Mads couldn't have thought of a stupider idea.

    Language:
    English
    Words:
    3,919
    Chapters:
    5/?
    Comments:
    24
    Kudos:
    54
    Bookmarks:
    4
    Hits:
    727

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