1 - 20 of 120 Works in Amalgamate(s) (Undertale)

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  1. Tags
    Summary

    Under sexed tale? Undertale sex? Get it?..

    Who am I kidding? This story is anything but undersexed! Still, it's so hard to find a title for an AU that hasn't already been used more than once. Heck, I'm sure this has been used somewhere too.

    I just don't want to get this confused with something like UnderHerTail.

    It all starts when Frisk finds a 'File Editor' in San's Lab and spends several runs hacking files and editing details... until everything goes 'wrong'.

    There is a plot of some kind in here somewhere. Good luck finding it.

    Language:
    English
    Words:
    15,188
    Chapters:
    12/?
    Comments:
    24
    Kudos:
    40
    Bookmarks:
    1
    Hits:
    2836
  2. Tags
    Summary

    Because Deltarune isn't exactly complete, the first chapter is based off one of many endings I thought Deltarune would take. This idea has also been in my head for a while.

    Kris and the Fun Gang have been unable to stop the Angel's Heaven from destroying the world and causing Kris to reload their save. Multiple times, actually. No matter what they did, it wasn't enough. The Angel's Heaven would always destroy them.

    So what happens when The Knight (Gaster) drags The Fun Gang into the void and separates them in another universe.

    One in which the Monsters were sent underground after a war with the humans.

    Now traveling with a small, silent yet flirty child, Kris has to find their friends in a new environment, where everyone they once knew now wanting their soul.

    Welcome to the Underground, Kris. Enjoy your stay.

    Language:
    English
    Words:
    8,845
    Chapters:
    5/?
    Comments:
    8
    Kudos:
    17
    Bookmarks:
    3
    Hits:
    117
  3. Tags
    Summary

    As Frisk reread Alphys' note for the fifth time, they wondered just what she could have done that was so disquieting that she couldn't directly confess to everyone.

    But before they could board the elevator and discover for themselves, they heard a voice.

    "Darling! Wait!"

    ...

    (The one where Mettaton decides to accompany Frisk through the True Lab.)

    Language:
    English
    Words:
    4,034
    Chapters:
    1/6
    Comments:
    2
    Kudos:
    5
    Hits:
    74
  4. Tags
    Summary

    Kris and Susie frequently return to the Dark World, which has been made easier by the help of a family member. Despite getting to see Ralsei, his best friend, as often as he wishes, Kris has felt that something's been missing ever since he left the Dark World for the first time. He's hoping to explain what's been going on to Ralsei, believing that the two of them can figure out how to solve his problem - while having no idea of what the day will have in store for them.

    Language:
    English
    Words:
    7,140
    Chapters:
    5/6
    Comments:
    12
    Kudos:
    44
    Bookmarks:
    3
    Hits:
    656
  5. 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:
    1,146
    Chapters:
    2/?
    Comments:
    13
    Hits:
    51
  6. Tags
    Summary

    Dr Alphys, under the pressures of all her failures, finds herself slowly slipping away and losing the will to continue.

    By some twisted miracle, she lives, unsure as to how it was even remotely possible. Clearly someone rescued her, but who?

    And Papyrus won't stop going on about his new friend.

    Alphys, with all her scientific and dating sim knowledge, considered herself well-prepared. But no amount of science and shoujo anime could've prepared her for someone like Undyne.

    (mermaid!undyne au)

    Series
    Language:
    English
    Words:
    58,997
    Chapters:
    6/?
    Comments:
    53
    Kudos:
    52
    Bookmarks:
    9
    Hits:
    613
  7. Tags
    Summary

    Seeking shelter from a storm, a blind child descends into a realm of monsters. A chance meeting grants him a companion in the form of a ghostly girl garbed in the colors of flowers. Yet, what seems but a simple adventure becomes much more as memories of dark pasts claw their way to the surface. Lives forsaken, a name unspoken... what does this new future hold in store?

    Language:
    English
    Words:
    162,687
    Chapters:
    19/?
    Comments:
    58
    Kudos:
    130
    Bookmarks:
    17
    Hits:
    2842
  8. 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:
    26
    Bookmarks:
    4
    Hits:
    192
  9. Tags
    Summary

    In all honesty, the pain should mean nothing, right? Every moment of suffering saved countless lives, so Sans should have no reason to complain, right? His father was doing this out of love… right?

    Language:
    English
    Words:
    16,823
    Chapters:
    9/?
    Comments:
    57
    Kudos:
    107
    Bookmarks:
    10
    Hits:
    880
  10. Tags
    Summary

    "Yeah. We'll free everyone. And with all this time stuff, it'll be like you were never gone."

    "But, be careful, okay? Make sure you come back. Even if it means giving up, stay determined to live, to come back. You're more important than the plan."

    ---

    A long time ago, a human fell into the Ruins. Confused and alone, they called out for help. But nobody came. The human clung to the shadows and hid in the dark. No one knew they were there for a long time. Like a demon, the human crept through the Underground. Until eventually, the human must have arrived at New Home. That's when we found out. Because... Asriel disappeared. No trace of him was left. Not even his dust. And once he was gone, the human left. The kingdom fell into despair. The king and queen lost their child seemingly overnight. The humans had once again taken everything from us. The king decided it was time to end our suffering. Every human who falls down here must die. With enough souls, we can shatter the barrier forever.

    You should be smiling, too. Aren't you excited? Aren't you happy? We're going to be free.

    Series
    Language:
    English
    Words:
    38,052
    Chapters:
    16/18
    Comments:
    12
    Kudos:
    44
    Bookmarks:
    5
    Hits:
    1029
  11. Tags
    Summary

    Alphys makes a mistake.

    And it's one that, this time, the human isn't coming back from.

    Language:
    English
    Words:
    8,809
    Chapters:
    1/3
    Comments:
    11
    Kudos:
    17
    Bookmarks:
    4
    Hits:
    175
  12. Tags
    Summary

    Alphys investigates some strange noises coming from the True Lab. Christmas Gift for Sandbirde.

    [Beltane smut commish sale!]

    [Join my Discord server!]

    Language:
    English
    Words:
    2,474
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    6
    Hits:
    129
  13. Tags
    Summary

    After a while on the surface, the monster race wakes up to the Underground one day. To put it shortly, it sucks.

    In which the horribleness of a post-pacifist reset are explored, one where EVERYONE remembers.

    Language:
    English
    Words:
    5,886
    Chapters:
    1/1
    Comments:
    20
    Kudos:
    23
    Bookmarks:
    3
    Hits:
    192
  14. Tags
    Summary

    Basically the script of Undertale with a twist at the end. Each Undertale character is played by someone from the Legend of Zelda series. First chapter is the Cast List, then we get on with the fun stuff!

    Language:
    English
    Words:
    4,409
    Chapters:
    3/?
    Kudos:
    7
    Hits:
    293
  15. Tags
    Summary

    WARNING: Melting into a (???), Experimentation.

    Series
    Language:
    English
    Words:
    357
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    1
    Hits:
    33
  16. Tags
    Summary

    A girl with a dark past finds that fate had other things planned for her instead of death. But where exactly was she anyway? And how was she going to bring someone back into existence? Wasn't he supposed to be the smart one here? Oh well, at least monsters are nicer than humans
    (A common excuse I know, but I do suck at summaries lol)

    Series
    Language:
    English
    Words:
    14,675
    Chapters:
    3/?
    Comments:
    16
    Kudos:
    36
    Bookmarks:
    8
    Hits:
    284
  17. Tags
    Summary

    It wasn't Floweys first Timeline like this and is probably not his last either. But something didn't feel right.

    Something was of.

    ...

    Next round he will try something new.

    Language:
    English
    Words:
    40,739
    Chapters:
    13/13
    Comments:
    26
    Kudos:
    20
    Bookmarks:
    1
    Hits:
    338
  18. Tags
    Summary

    Dr. Gaster is searching for souls through dreams, but he finds one whose sexuality brings out the kink in every creature of the underworld.

    No one seems safe from this girl's perseverance to be able to take just about anything. And it's driving Gaster wild with curiosity... and desire.

    *Warning: plot is adorned with a shameless amount of sex.
    *Tags updated as new kinks, pairs, and experiments are explored.
    *Chapter Titles updated with pairings for those who want to skip past the plot and read specific pairings. I aim to please. Leave me a comment if I succeed ;-)

    Language:
    English
    Words:
    59,253
    Chapters:
    28/?
    Comments:
    326
    Kudos:
    648
    Bookmarks:
    76
    Hits:
    25841
  19. Tags
    Summary

    Life on the surface is definitely better than the Underground, but it does come with its downfalls. Frisk is grown up and now has a bachelor’s in politics, ready to take on the role of Monster Ambassador and fight for equal rights amongst the races. She does this out of the kindness of her soul along with her determination, of course... okay, and maybe the forbidden belief of one day being with a certain skeleton adds to her motivation as well. Her obstacles range from narrow-minded humans to hopeless monsters. But perhaps her biggest obstacle is something— or someone— hiding inside her very soul...

     

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    Series
    Language:
    English
    Words:
    24,596
    Chapters:
    9/?
    Comments:
    22
    Kudos:
    87
    Bookmarks:
    7
    Hits:
    1234
  20. Tags
    Summary

    So maybe you were too kind. The world pummeled you over and over again. When a chance for freedom arises you take it and it gets you pushed down a mountain. For what purpose, you were following your parents will. Then again, they weren't the brightest bunch to begin with... How will the monster kingdom react to a monster from the surface?

    Series
    Language:
    English
    Words:
    81,010
    Chapters:
    29/?
    Comments:
    127
    Kudos:
    88
    Bookmarks:
    4
    Hits:
    2074

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