1 - 20 of 2255 Works in Underfell Sans (Undertale)

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  1. Tags
    Summary

    What happens when you combine a depressed mess in an abusive relationship with a mix of overprotective and semi emotionally constipated skeletons. Fun times, let me tell y'all.

    Language:
    English
    Words:
    7,009
    Chapters:
    2/?
    Comments:
    3
    Kudos:
    3
    Bookmarks:
    2
    Hits:
    86
  2. Tags
    Summary

    A century after King Mets rose to power in the UG, it's the happiest place under the Earth, with all of the traditional monster lands reformatted into theme parks for humans to enjoy.

    Of course, there's a seedy underbelly to every happiest place, and most skeletons live in the middle of it. An elite team of thieves, still wracked by a devastating loss, are going after their biggest job yet, one that will turn the UG upside down. To pull it off, they need the help of Stretch and Blue, two low-level thieves working out of Winter Wonder World park.

    All the while, the only skeleton member of the Royal Guard, Black, is tasked with making sure no one gets too close to King Mets. When he gets word that the 100 year celebration is at stake, he must do whatever it takes to save the day.

    A story told in 250 words a day.

    Language:
    English
    Words:
    32,257
    Chapters:
    131/?
    Comments:
    1694
    Kudos:
    82
    Bookmarks:
    12
    Hits:
    2685
  3. 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:
    249,303
    Chapters:
    37/?
    Comments:
    687
    Kudos:
    273
    Bookmarks:
    51
    Hits:
    10088
  4. Tags
    Summary

    you and your friend a/n took up a side job,a missing boat report to try and save some random poor family lost at sea.You found them,but then a random fucking waterspout took you and your friend to a isalnd where horny skeletons wait your arrival and well......this is gonna be a crazy ride

    Language:
    English
    Words:
    17,800
    Chapters:
    5/?
    Comments:
    4
    Kudos:
    2
    Hits:
    35
  5. Tags
    Summary

    You and your sister wonder the world. Looking for something fun to do.
    Unfortunetely for you, a skeleton with an attitude problem got in the way of your perfect day.

    It can only get better from there. Especially when you invite said skeleton to join you against your sister's wishes.

    Uploads are gonna be frequent if possible.
    If I haven't posted in more than 2 weeks spam my inbox.
    Make sure to give lots of love (the right kind) to readsleepcoffee's fic Brace for it. As my work is inspired by hers.

    Language:
    English
    Words:
    18,755
    Chapters:
    6/?
    Comments:
    13
    Kudos:
    39
    Bookmarks:
    8
    Hits:
    496
  6. Tags
    Summary

    Red is a teacher. Sans is a bumbling ball of depression and anxiety. They're in love. This is their life together as told in ficlets of various lengths that I'll post twice a week. They're based on these prompts.

    Language:
    English
    Words:
    14,346
    Chapters:
    17/30
    Comments:
    235
    Kudos:
    128
    Bookmarks:
    20
    Hits:
    1867
  7. Tags
    Summary

    Dr. Sans Serif has been chosen to conduct an expedition to a newly discovered planet. There's a lot riding on this expedition; what Sans finds on this new planet could change the course of life on Earth.

    It’s a six week journey aboard a ship that is crewed largely by minimum risk offenders looking to trade labor for a commuted sentence that are kept in line by a group of soldiers led by Commander Red Gaster. At first the Commander seems to see Sans as nothing more than an assignment, someone he was charged with keeping out of harm’s way both aboard the ship and at their destination. But as they get to know each other, Sans is determined to win him over, though he needs to do it without losing focus on what he's come this far to achieve.

    Language:
    English
    Words:
    4,600
    Chapters:
    46/?
    Comments:
    469
    Kudos:
    159
    Bookmarks:
    15
    Hits:
    2679
  8. Tags
    Summary

    Set after the events of MyTale. The multiverse holds limitless possibilities, and multiple chances to do things over. Maybe struggling to do things right will build the path toward redemption? Or at least give some closure to a guilty and troubled mind.
    Multiple fourth-wall breaks. Self-insert as Frisk. Some suggestive stuff here and there, but no romance that's out of canon. Can be read as a stand-alone if you don't mind spoilers.

    Series
    Language:
    English
    Words:
    38,676
    Chapters:
    7/26
    Comments:
    11
    Kudos:
    5
    Bookmarks:
    2
    Hits:
    142
  9. Tags
    Summary

    Error explains the storyline, History and Endings of Dreamtale for everyone to understand.

    Series
    Language:
    English
    Words:
    1,745
    Chapters:
    1/1
    Kudos:
    25
    Bookmarks:
    2
    Hits:
    106
  10. Tags
    Summary

    inspired by a scene in my head about a crazy Bitty-Bones, which grows into a story of craziness and bizarre happenings.

    What happens when you suddenly get a wild idea and adopt three different Bitties? This is a story of just that; of how a single decision can spark an epic tale of adoration, love, soulmates, heart-break and multi-dimensional happenings. At the heart of it all stands a pack of Bitties and their Angel-Cake/Goddess/Lady.

    Language:
    English
    Words:
    64,253
    Chapters:
    19/?
    Comments:
    115
    Kudos:
    367
    Bookmarks:
    69
    Hits:
    9208
  11. Tags
    Summary

    Nightmare and his crew are conducting what is essentially a killing game in order to gain a new recruit. out of about twenty three, only two stand promising. that being you, and another girl. the rules are simple, and quite similar to the hunger games. (thanks to cross’ obsession with movies.)

    you had agreed to participate in order to fend for your mother and little brother. lets hope you dont slip up and break your neck, yeah?

    Language:
    English
    Words:
    2,996
    Chapters:
    2/2
    Kudos:
    2
    Bookmarks:
    1
    Hits:
    59
  12. Tags
    Summary

    I'm a multishipper so not all the stories will have the same ship and none of them will be connected unless they are.

    It won't be just romance, I'll have some platonic one shots.

    Most stories are going to be 13+

    I will be writing mainly angst and fluff.
    No lemons but probably a few limes idk.

    If you have any requests, let me know. I need :')

    Also my writing is pretty shit so I'd appreciate any tips :))

    Language:
    English
    Words:
    43,413
    Chapters:
    29/29
    Comments:
    66
    Kudos:
    132
    Bookmarks:
    11
    Hits:
    4444
  13. Tags
    Summary

    Everyone is recovering from the ambush that left Red injured. And, just like in every recovery, there's an adjustment period where everything feels a step to the left of normal.

    It's in that place of discomfort, however, that gives everyone a new lens of perspective.

    Series
    Language:
    English
    Words:
    15,177
    Chapters:
    4/?
    Comments:
    11
    Kudos:
    51
    Bookmarks:
    5
    Hits:
    394
  14. Tags
    Summary

    "Have you seen this girl? If so please call your local police department immediately for accounts of murder, trespassing and evasion. In other news monsters have been released from what appears to be underground, are they friends or foes"? ....

    Life wasn't always this hard. It used to be quite simple really, go to school, learn nothing, come home, eat, sleep and repeat. That all changed when the monsters were set free. No one even remembered they were real and yet here they are trying to make peace in a world that fights against its self. Where do I fall into all this? The government isn't happy that monsters are on the surface and are trying everything to put them back where they supposedly belong. For that they need magic but humans have forgotten magic for quite some time now so finding out whos got the genes is kinda hard. They followed the lineages of all seven mages that performed the spell before but hit dead ends, literally, until they found mine. The last hope of saving world domination or destroying it. Monsters aren't clueless either they know what the government is trying to do and they want to stop it at all costs. So where does that leave me?

    Language:
    English
    Words:
    2,856
    Chapters:
    2/?
    Kudos:
    1
    Bookmarks:
    1
    Hits:
    40
  15. Tags
    Summary

    The perfect recipe for disaster:
    One rainy night
    Two lonely souls
    Four hours spent at a shabby little bar swapping bad jokes and sad stories
    Several poorly thought-out drinks
    And one huge mistake.
    Throw in a dash of magic, a twist of fate, and the end result is something even a scientific genius like Sans never could have forseen.

    If he survives this, he'll never touch another drink again.

     

    (It's been a long time since I've really written anything, so I apologize if it sucks. This is basically just a self-indulgent story idea that I've had tumbling around in my head for a while now and I finally decided to say fuck it, and write the damn thing.

    Please don't ask about an update schedule as I have no idea when/how often updates will be. It all depends on how I'm feeling and whether my brain will cooperate.

    I hope you enjoy the ride)

    Language:
    English
    Words:
    2,184
    Chapters:
    2/?
    Comments:
    10
    Kudos:
    60
    Bookmarks:
    17
    Hits:
    516
  16. Tags
    Summary

    You live in New Ebott City. One day, you meet a pair of skeleton monsters who help you out. Soon, you meet more. Where did they all come from, and why are so many of them flirting with you?

    I made this work with Reader being nonbinary and specifically using they/them pronouns because I haven't seen it done before.

    Series
    Language:
    English
    Words:
    94,311
    Chapters:
    54/?
    Comments:
    717
    Kudos:
    1126
    Bookmarks:
    231
    Hits:
    33151
  17. Tags
    Summary

    You just moved away from home and into your very own apartment! What will you do with your newfound freedom? Get a pet of course! Or at least that was the plan before you ended up taking in two bitties instead. They're guarded from living less than ideal lives and you don't feel like the right person to be helping them, but you will if you must (at least until you can find them a proper home). Will you hand them over to someone more capable or will you get so attached that you become that capable person yourself?

    Series
    Language:
    English
    Words:
    15,301
    Chapters:
    12/?
    Collections:
    1
    Comments:
    48
    Kudos:
    123
    Bookmarks:
    35
    Hits:
    1811
  18. Tags
    Summary

    A short smutty one-shot about a pissed-off reader decides he has had enough of sans' (underfell) shit and gets with a girl (an original character) in a club, only for sans (underfell) to walk in and angry, public sex ensues.

    Language:
    English
    Words:
    1,418
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    36
    Hits:
    218
  19. Tags
    Summary

    Now the monsters have risen up from the underground a new a era had been born. Some humans turned into monsters and was place in a facility. What if you run away and live on your own until u met a group of skeletons

    Language:
    English
    Words:
    3,267
    Chapters:
    2/?
    Comments:
    3
    Kudos:
    8
    Bookmarks:
    4
    Hits:
    67
  20. Tags
    Summary

    It's cold-

    Like the waters that sunk us

    Like the grave of my family

    Like the island im lost on

    Like the souls of the beasts

    ...Or is it?

    Language:
    English
    Words:
    31,253
    Chapters:
    18/?
    Comments:
    43
    Kudos:
    133
    Bookmarks:
    38
    Hits:
    3001

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