1 - 20 of 2013 Works in Underfell Sans (Undertale)

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  1. Tags
    Summary

    Red has lived with his brother, Edge, for years at their newest foster home. He's made a few friends, ones he sees on the regular. And he's told Undyne and Alphys that they can bring over friends of their own anytime they want. They'd never taken him up on that offer before.

    Now, Alphys comes over with a new friend. His name is Sans.

    He's weird. Red doesn't mind, but when Sans runs out in the middle of movie night it raises some red flags. Is Sans okay? Probably not. But is it Red's place to care?

    VERY alternate of an AU: Monsters were never Underground, and the social dynamics are totally different. It's literally so AU it's practically an original work with the same characters. Oops.

    If you came here from my other fic, One Step Back, this is NOTHING LIKE THAT ONE. Well, maybe a little, but not enough for that to be a good comparison for whether you'll like this or not. This one gets darker. A lot darker.

    Series
    Language:
    English
    Words:
    12,336
    Chapters:
    3/?
    Comments:
    6
    Kudos:
    6
    Hits:
    22
  2. Tags
    Summary

    As it turns out, one of the biggest problems with parenting is that it's impossible to know everything. Absolutely impossible. Which means you have a few options.

    1) improvise

    2) ask for help

    And in a society built on conflict and aggression, asking for help is something only done when desperate.
    Red and Edge are getting desperate, though, so they ask.
    The results gain them a new perspective, and maybe there's hope for monsterkind after all.

    Series
    Language:
    English
    Words:
    11,771
    Chapters:
    3/?
    Comments:
    7
    Kudos:
    44
    Bookmarks:
    3
    Hits:
    185
  3. Tags
    Summary

    Sans finally got his big break as a comedian and is ready to tour the country with his act. But being the son of a famous scientist with many powerful enemies, Gaster isn't going to let him go alone. He hires his son a bodyguard, another skeleton named Red, whose job it is to keep Sans safe at all costs. But Sans isn't about to make it easy for him.

    Language:
    English
    Words:
    1,700
    Chapters:
    17/?
    Comments:
    121
    Kudos:
    73
    Bookmarks:
    12
    Hits:
    916
  4. Tags
    Summary

    Their world is shit, and the only good things in it are Grillby's shitty greasy food and Sans' brother, Papyrus. They can usually drop the act somewhat at home, and though their love language is often insults and backhanded compliments, lately, it's become a problem in the way Paps is acting out. Sans loves his brother fiercely and would fight and kill anyone for him; the thought of anyone touching him with malice makes him want to crush them underfoot. But he knows his spiny brother is still that soft-hearted kid, deep down, and wants him to open up. He has also realized that, at some point, his own feelings for Papyrus changed. He holds back but it has become a constant underlier to everything. What can he do?

    (Underfell AU, Fellcest longfic, happy early Kinktober, everyone!)

    Language:
    English
    Words:
    6,322
    Chapters:
    2/?
    Comments:
    1
    Kudos:
    8
    Hits:
    68
  5. Tags
    Summary

    I've never seen another skeleton. Especially not like this...

    They were injured. Their leg stuck in a bear trap. Every time they moved the deeper the jaws sink into their bones.

    I should have just let them go and left them to their devices, but for some reason I couldn't. Maybe it was because he was an omega. Maybe it was my curiosity, but now I got more to worry about.

    Language:
    English
    Words:
    13,972
    Chapters:
    5/?
    Comments:
    41
    Kudos:
    259
    Bookmarks:
    54
    Hits:
    2360
  6. Tags
    Summary

    Red, Edge’s brother, had been hiding away in the lab recently, messing with some sort of machine that he didn’t seem eager to tell Edge about. Edge, obviously, didn’t plan on letting this slide. 

    After yet another day of Red blocking himself in, Edge decided that he would put a stop to it.

    By breaking the door down. And nagging him, not letting Red get a word in, as he stepped closer to inspect this machine that Red kept hidden.

    “WHAT EVEN IS THIS, ANYWAYS? WHAT MAKES IT SO IMPORTANT-”

    There was a click, a snap, and a whir.

    And then Edge was gone in a flash of light.

    Series
    Language:
    English
    Words:
    9,223
    Chapters:
    4/?
    Comments:
    16
    Kudos:
    26
    Bookmarks:
    2
    Hits:
    262
  7. Tags
    Summary

    What's the point of falling in love if at any moment your world can be reset and everything ripped away? That's how Red feels, anyway.

    Language:
    English
    Words:
    34,704
    Chapters:
    12/?
    Comments:
    120
    Kudos:
    120
    Bookmarks:
    17
    Hits:
    2343
  8. Tags
    Summary

    Skeleton smut for the ones (like me) that are into it.
    Frans and Papara in whatever universes I feel like writing them. Updates are veeery sporadic. Feel free to send suggestions! (I don't promise I'll use it, but maybe you'll get me inspired)

    Language:
    English
    Words:
    3,705
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    3
    Hits:
    62
  9. Tags
    Summary

    Y/N. A skeletal wolf monster who lived as a hunter in Horrortale alongside the Skeleton brothers to help other monsters survive the famine Underground. Human flesh was a delicacy. It was not something she wanted to consume. None of them had a choice. She was feared by many for her ferocious strength and temper. Only the Horror brothers UNDERSTOOD her. They continued to suffer until...
    Their house appeared above ground. Strange skeletons much alike her own skellies seem to want to keep them within the forest due to their hellish appearances. It might be due to fear...and the woman who had them wrapped around their finger. Y/N would not allow them to bully her best friends.

    Language:
    English
    Words:
    9,247
    Chapters:
    8/?
    Comments:
    22
    Kudos:
    130
    Bookmarks:
    31
    Hits:
    1711
  10. Tags
    Summary

    Prequel to Omega's Respite

    When the Underswap skeletons make it to the surface, Stretch is not at all impressed with the taller Fell brother. Sparks fly in between them, but can they sort out their differences and learn to appreciate each other?

    In the meantime, Sans is infatuated with his friend, the other Fell brother, Red. But Red is wrapped up in his own bad coping skills, and doesn't want anything more than a fuck buddy. How will Sans get Red to open up more and give real romance a try?

    Series
    Language:
    English
    Words:
    95,870
    Chapters:
    13/?
    Comments:
    150
    Kudos:
    52
    Bookmarks:
    9
    Hits:
    1945
  11. Tags
    Summary

    Congratulations!!

    You're one of the 'Lucky' few to get your hands on a copy of Broken Souls! It's a once in a lifetime opportunity to play with our 'Immersive' technology!!

    Create a Unique character! Meet Interesting Characters! Fall in Love! Unlock Secretes, and Much, Much More!

    Warning!!

    We are not Liable for any harmed caused! Have fun, stay safe, but most importantly!

    Don't. Die.

    Language:
    English
    Words:
    107,749
    Chapters:
    22/?
    Comments:
    607
    Kudos:
    487
    Bookmarks:
    103
    Hits:
    11022
  12. Tags
    Summary

    Being a kid is hard. Being a kid after serious trauma is also hard. Relearning new rules and new expectations... it's a lot to handle, especially as a kid.
    There's one thing Papyrus has been able to do without difficulty, however, and that's making friends.

    A continuation of "One Step Back" that will spread throughout the entirety of the series, no doubt. It starts a couple of weeks after "Pack Bond"

    Series
    Language:
    English
    Words:
    10,035
    Chapters:
    3/?
    Comments:
    10
    Kudos:
    38
    Bookmarks:
    1
    Hits:
    199
  13. Tags
    Summary

    [Y/N] [L/N] is a powerful mage with a bloodline well-known throughout the ages and her family have always been celebrated. They, however, despise how their bloodline trapped monsters beneath the ground. But, that is for another day. In not being able to afford basic accommodation for university, they had to rely on an old (and terrible) friend named Bethany. For some reason, most of Bethany's skeleton mates despise [Y/N] but why is that? Apart from the fact she is a mage?
    Just because she has a kindness soul, it doesn't mean she will stand for their bullshit.

    Language:
    English
    Words:
    2,412
    Chapters:
    2/?
    Comments:
    8
    Kudos:
    35
    Bookmarks:
    17
    Hits:
    381
  14. Tags
    Summary

    [Y/N] [L/N]. A 23-year-old woman known for her intelligence in the field of science and monster history. Ever since she was five years old, she has been known as a genius, someone who could make the world a better place. Of course, monsters have always intrigued her, so she is pleased when they appear from Mt. Ebott. With a family who question her own intelligence and authority, who knows what the future has to bring? Then again, why should she care?

    Language:
    English
    Words:
    13,610
    Chapters:
    11/?
    Comments:
    26
    Kudos:
    107
    Bookmarks:
    32
    Hits:
    1706
  15. Tags
    Summary

    [Y/N] [L/N] is a powerful mage with a bloodline well-known throughout the ages and her family have always been celebrated. They, however, despise how their bloodline trapped monsters beneath the ground. But, that is for another day. In not being able to afford basic accommodation for university, they had to rely on an old (and terrible) friend named Bethany. For some reason, most of Bethany's skeleton mates despise [Y/N] but why is that? Apart from the fact she is a mage?
    Just because she has a kindness soul, it doesn't mean she will stand for their bullshit.

    Language:
    English
    Words:
    82,260
    Chapters:
    66/?
    Comments:
    316
    Kudos:
    473
    Bookmarks:
    85
    Hits:
    15391
  16. Tags
    Summary

    Another ATTL!AU for friend skerb! Edge is the only one to make it back from their trip to Underfell. Red, Edge and Papyrus try their best to bring Sans home. Things get complicated.

    Series
    Language:
    English
    Words:
    5,304
    Chapters:
    1/2
    Comments:
    29
    Kudos:
    105
    Bookmarks:
    9
    Hits:
    459
  17. Tags
    Language:
    English
    Words:
    222
    Chapters:
    1/1
    Kudos:
    1
    Hits:
    15
  18. Tags
    Summary

    Nightmare : Boss man

    Cross : mental breakdown

    Killer : stab stab

    Dust : Dead inside

    Horror : Human soup

    Red : bitch

    Error : Crashes

    Language:
    English
    Words:
    5,759
    Chapters:
    25/26
    Comments:
    299
    Kudos:
    92
    Bookmarks:
    10
    Hits:
    1102
  19. Tags
    Summary

    Papyrus is dead. Frisk can't reset. Sans was losing his mind. His only solution was to pull through alternate versions of him until he finds him again.

    Unfortunately, you're the one in charge of babysitting your best friend and his dead brother's alternate versions.

    Series
    Language:
    English
    Words:
    168,992
    Chapters:
    25/?
    Comments:
    582
    Kudos:
    1048
    Bookmarks:
    257
    Hits:
    27100
  20. Tags
    Summary

    A wish had been made by Frisk when it was their birthday which is hoping for no genocidal route, reset nor Chara's disturbance in control. Meanwhile, Sans granted their wish by sacrificing himself as a vessel for Chara and trap them with G̵̦̼̤͇̹̗͋̾̍̂͠͝͠a̴͇̙̫̼͛s̶͈͓͍̪̮̼͋̿̔t̵̰̰̣̋̂ͅe̸͖̜͉̮̫͙̓̃ṛ̸̢̖̣͖͔͗'s help to maintain Chara's control without Frisk's knowledge. Yet, Chara always try to find a way out...

    Language:
    English
    Words:
    3,384
    Chapters:
    2/12
    Hits:
    24

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