1 - 20 of 112 Works in Underfell Grillby (Undertale)

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  1. Tags
    Summary

    Undertale Kinktober 2018!
    Chapters of varying sizes and many...many...kinks and pairings.
    Enjoy!

    Language:
    English
    Words:
    10,534
    Chapters:
    15/31
    Comments:
    37
    Kudos:
    93
    Bookmarks:
    8
    Hits:
    2005
  2. Tags
    Summary

    This is the Underfell version of my Undertale story there are parallels to it. There are major differences like how the characters would react to each other new characters some have bigger parts or smaller parts to the story. Frisk still exists and Ember still loves her. She's physically and mentally different from Undertale Ember she has more muscles than her original. She has tattoos and her eyes always change colors whatever her current mood is. Her past is extremely different from the other ember too for one she remembers it and wishes she could forget it.

    Series
    Language:
    English
    Words:
    29,345
    Chapters:
    33/?
    Kudos:
    6
    Hits:
    103
  3. Tags
    Summary

    Amnesia curse you dammit!
    Ah yes....down in the dark, confusing, dangerous Underground with no memory of how you are there.
    Lovely.
    Can you sense my sarcasm?
    Oh well, at least there are a few friendly people....well...monster's down here! Kinda? Heh?
    I'm totally boned...

    Language:
    English
    Words:
    849
    Chapters:
    1/?
    Kudos:
    6
    Hits:
    49
  4. Tags
    Summary

    Sai’s mansion has grown in size and holds many monsters and humans. Friends all alike they spend their days enjoying the sun or working on their own many projects.

    But when Gaster’s project fails, they find out that the multi-verse is far more complex than any of them imagined. How the smallest different decision or coincidence can lead to the biggest difference.

    Language:
    English
    Words:
    7,219
    Chapters:
    3/3
    Kudos:
    4
    Bookmarks:
    1
    Hits:
    128
  5. Tags
    Summary

    It wasn't exactly under happy circumstances that you were here, but you were going to make the best of it all the same.

    ---

    For a request to write fluff, with a pairing of my choosing. (So of course I picked a Grillby pairing.)

    Series
    Language:
    English
    Words:
    919
    Chapters:
    1/1
    Kudos:
    20
    Hits:
    230
  6. Tags
    Summary

    You fall. With almost nothing to lose, death is a welcoming embrace. Instead, you're given a new chance at a better life.
    But is this really the Underground to look for that?
    One mistake brings the hardheaded heroine to the Underground with the motto "Kill or Be Killed" still in heavy effect. Without the power to RESET, Jenny Peterson is powerless to change things, including learning the price of her death. Was she sent down to free the Underground or was she sent down to help the Monsters turn a new leaf? Not even Gerson knows!

    Language:
    English
    Words:
    18,791
    Chapters:
    10/?
    Comments:
    2
    Kudos:
    8
    Hits:
    123
  7. Tags
    Summary

    Tired of seeing his children suffer in underfell Gaster does something cruel to the swap bros.

    The swap brothers now find themselves thrown into a world of kill or be killed with their dark copies watching their every move. It is unsure if they are friends or foe. They struggle to find a balance living in the Fell brothers' dark world when there already seems to a hatchet between the dark brothers themselves.

    Language:
    English
    Words:
    62,837
    Chapters:
    26/?
    Comments:
    4
    Kudos:
    117
    Bookmarks:
    11
    Hits:
    1619
  8. Tags
    Summary

    The balance within the world was now broken, but as with such universal constants it always finds a way to right itself through natural means. A balance of magic and science is required. The humans prior tried to exterminate the existence of magic to no avail. Every death of a mage would bring forth another as the magic buried itself deep into a new soul creating latent abilities in a chosen human child. The Seven: justice, bravery, patience, kindness, perseverance, integrity, and DETERMINATION would live on. If one perished then the magic would attach itself to another chosen soul. The lone town that knew the truth of their past was their only sanctuary. A place for them to escape from those that wished them harm, but absolute power corrupts absolutely and thus this is how our story… begins.

    Frisk clambered up the mountain. The mountain of so many horror stories, myths, and legends. She refused to be frightened by such things, but her heart was still racing as she ascended the peak of Mt. Ebott. It was rumored to be the home of bloodthirsty monsters that were cast into the mountain as punishment for their loss against humanity. It became nothing more than a scary story. Her hands convulsed when she prepared to jump.

    Series
    Language:
    English
    Words:
    196,829
    Chapters:
    27/?
    Comments:
    55
    Kudos:
    100
    Bookmarks:
    25
    Hits:
    3517
  9. Tags
    Summary

    Collection of drabbles, more specific info of each one in the chapter notes! Themes may or may not include Grillster, baby bones, and Dadster.

    Language:
    English
    Words:
    26,015
    Chapters:
    39/?
    Comments:
    46
    Kudos:
    144
    Bookmarks:
    15
    Hits:
    1966
  10. Tags
    Summary

    Two worlds collide and so many shattered in the mix. Undertale finds itself shattered all the pieces are now mixed with a new and dark universe. Underfell. The monster are cruel and dark and surprisingly they are tolerating the undertale monsters. Their dark king going as far as to promise his protection to ALL the monster within this newly expanded underground. But something doesn’t seem right, starting with Asgore’s dark cloaked advisor and lead scientist, Gaster. He seems a little too interested in the undertale monsters.
    The underfell monsters are sure the seventh human will fall soon and all of monsterkind must be ready to fight. Gaster’s oldest son Papyrus is the new leader of the joined royal guard and he’s a monster like no other. He is a living breathing killing machine with powerhouse magic to put any normal monster to shame. Now a gentle Papyrus must figure out these dark monsters’ plan before it’s too late.

    Language:
    English
    Words:
    1,756
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    9
    Hits:
    42
  11. Tags
    Summary

    UF Papyrus has been struggling with everything on his shoulders. Between his duties as a royal guard and the extra fights, he gets into protecting his 1 HP brother he is getting over his head. Now he is walking on the edge of insanity. To make matters worse his brother's experiments toss them into a new world far away from the one they knew. Everyone is weak and low on LV like unbelievably low. So this should make thing easier right? No! Because of a certain short statured loud mouth skeleton in a blue jacket. If there is anyone UF Papyrus would love to dust it would the Sans of this world. Oh, and a twisted little human is running a muck.

    Language:
    English
    Words:
    7,496
    Chapters:
    5/?
    Comments:
    16
    Kudos:
    72
    Bookmarks:
    7
    Hits:
    712
  12. Tags
    Summary

    I don't know how to summerise this so
    underfell kind of slavetale, babybones and child labour basically

     

    this is set in underfell, and is based on the events that happened before when you come calling, way way before, but if it was underfell.

    nobody asked for this and I should probably be instead working on my other major story's, like When you come calling, or son of science, or brother of bone... there is not even a work place thing for brother of bone! so this makes no sense as to how it even ties into everything.

    Series
    Language:
    English
    Words:
    1,608
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    6
    Hits:
    75
  13. Tags
    Summary

    Papyrus and Grillby don’t see eye to eye. When the two finally break up, what is a skeleton to do? On the other hand, a certain purple elemental has caught his eye. Classic!Papyrus x Underfell Grillby! (Named Fellby) SMUT, BONDAGE, Dom!Fellby, Sub!Papyrus

    Language:
    English
    Words:
    2,422
    Chapters:
    1/3
    Kudos:
    10
    Hits:
    161
  14. Tags
    Summary

    Reader is a singer at Grillby's bar here on the surface. Most of the time it's all good. Good food, well paying job, and the chance to ogle a certain hot bartender. It's only when a certain group of monsters come in that the trouble starts. Finally the reader has enough and decides to deal with it.

    Series
    Language:
    English
    Words:
    3,513
    Chapters:
    1/1
    Kudos:
    37
    Bookmarks:
    2
    Hits:
    490
  15. Tags
    Summary

    UF!Sans has given birth only a month a go to a healthy daughter, Frisk. Just one problem, she is a human. He doesn't care, she is his little star-light, he adores her. Even Papyrus is fond of her. The rest of Snowdin is not so understanding, and Sans escapes from a murderous mob to the Cursed Ruins as his brother holds of the mob. He makes it, and the Cursed Lich Gaster allows him entry. Sans is immediately smitten by the imposing Lich, but all the stories and legends of the ancient being are horrifying and told in hushed whispers to keep children in line. But surely they are not true? Sans is a bout to find out.

    Based of RP on Tumblr with @tempestjewelsin

    Language:
    English
    Words:
    109,278
    Chapters:
    20/?
    Comments:
    104
    Kudos:
    267
    Bookmarks:
    24
    Hits:
    15115
  16. Tags
    Summary

    One-shots based in the same universe as my other story Cookie. But this time the one-shots are requested by you guys.

    Series
    Language:
    English
    Words:
    13,747
    Chapters:
    6/?
    Comments:
    62
    Kudos:
    67
    Bookmarks:
    7
    Hits:
    1134
  17. Tags
    Summary

    A prompt I did for saiyurimai overt on tumblr
    Prompt:Thank you *blush* And hmmmm.....what about UF! Grillby aaaaaannnnnd Reader....aaaannnnddd...reader has been working for Fellby for a while now, wearing the uniform, bringing in good business for the bar since they're relatively attractive and human to boot so one day the human is getting hit on by one of the regulars, nothing too abnormal about that except the guys drunk, hitting on her more and more until he reached out and grabbed her ass, pulling her into his lap. That's the breaking point for Fellby who's got the hots for reader. He calls you his and anyone who even thinks about touching you will be dusted no problem, which turns you on and he notices, sending everyone home just so he can prove to you just how much you belong to him???

    Language:
    English
    Words:
    1,008
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    55
    Bookmarks:
    6
    Hits:
    546
  18. Tags
    Summary

    Monsters have reached the surface and are itching to go to war with humans. It doesn't help when you wander into the monster district and raise suspicions, leaving it up to Papyrus to investigate your motives.

    Language:
    English
    Words:
    36,413
    Chapters:
    4/?
    Comments:
    102
    Kudos:
    161
    Bookmarks:
    32
    Hits:
    1289
  19. Tags
    Summary

    You fell and you can't remember a damn thing. Not who you are nor where you came from. But somehow you still feel all your past sins still crawling up your back, even if you can't recall them specifically. Maybe you'll survive, maybe you won't. Maybe you don't really give a shit.

    Language:
    English
    Words:
    2,992
    Chapters:
    2/?
    Comments:
    16
    Kudos:
    35
    Bookmarks:
    5
    Hits:
    411
  20. Tags
    Summary

    Papyrus sees an online ad for a holiday fake date, he decides this would be the perfect jape! The whole family is supposed to gather at his parents' house this year, why not throw in a fun jape while they're at it. But a sudden change in the family's plans throws a wrench into the whole thing. Well, at least some good came of this disaster, who knew his brother and his fake date were so compatible?

    Language:
    English
    Words:
    4,194
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    28
    Bookmarks:
    1
    Hits:
    176

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