1 - 20 of 2270 Works in Underfell Sans (Undertale)

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  1. Tags
    Summary

    Welcome back >:)

    Series
    Language:
    English
    Words:
    3,888
    Chapters:
    34/34
    Comments:
    117
    Kudos:
    36
    Bookmarks:
    1
    Hits:
    539
  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:
    34,443
    Chapters:
    140/?
    Comments:
    1853
    Kudos:
    83
    Bookmarks:
    11
    Hits:
    2926
  3. Tags
    Summary

    It's been months since you last heard from your skeletons, you missed them. And you were fucking worried! So you decided, you know where they live why not pop by.

    Well you weren't expecting eight skeletons who were NOT yours standing in the living room- you
    just wanted to see your husband…. NOT GET FOUR MORE-

    Sans

    Sans, what are you doing STEP AWAY FROM THE MACHINE

     

    You are married to papyrus who is your soulmate, when sans drags you into his mess.
    Now you have more. This is fine right?-

    Language:
    English
    Words:
    2,859
    Chapters:
    3/?
    Comments:
    10
    Kudos:
    97
    Bookmarks:
    26
    Hits:
    1116
  4. 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:
    24,843
    Chapters:
    8/?
    Comments:
    11
    Kudos:
    15
    Bookmarks:
    5
    Hits:
    385
  5. 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:
    5,500
    Chapters:
    55/?
    Comments:
    583
    Kudos:
    187
    Bookmarks:
    15
    Hits:
    3296
  6. Tags
    Summary

    𝕐𝕠𝕦 𝕙𝕒𝕧𝕖 𝕓𝕖𝕖𝕟 𝕥𝕣𝕒𝕟𝕤𝕡𝕠𝕣𝕥𝕖𝕕 𝕚𝕟𝕥𝕠 𝙽𝚘 𝙺𝚒𝚕𝚕𝚒𝚗' 𝚝𝚑𝚎 𝚅𝚒𝚕𝚕𝚊𝚒𝚗™! 𝕎𝕖 𝕙𝕒𝕧𝕖 𝕣𝕒𝕟𝕕𝕠𝕞𝕝𝕪 𝕤𝕖𝕝𝕖𝕔𝕥𝕖𝕕 𝕪𝕠𝕦, 𝕒𝕤 𝕥𝕙𝕚𝕤 𝕨𝕚𝕝𝕝 𝕓𝕖 𝕒 𝕔𝕙𝕒𝕟𝕘𝕖 𝕗𝕣𝕠𝕞 𝕪𝕠𝕦𝕣 𝕒𝕝𝕣𝕖𝕒𝕕𝕪 𝕓𝕠𝕣𝕚𝕟𝕘 𝕝𝕚𝕗𝕖!

    𝕀𝕟 𝙽𝚘 𝙺𝚒𝚕𝚕𝚒𝚗' 𝚝𝚑𝚎 𝚅𝚒𝚕𝚕𝚊𝚒𝚗™ 𝕪𝕠𝕦 𝕘𝕖𝕥 𝕥𝕠 𝕝𝕚𝕧𝕖 𝕒𝕤 𝕤𝕠𝕞𝕖𝕠𝕟𝕖 𝕖𝕝𝕤𝕖, 𝕒𝕟𝕕 𝕪𝕠𝕦𝕣 𝕞𝕒𝕚𝕟 𝕘𝕠𝕒𝕝 𝕚𝕤 𝕥𝕠 𝕊𝕌ℝ𝕍𝕀𝕍𝔼! 𝕐𝕠𝕦 𝕞𝕒𝕪 𝕕𝕠 𝕤𝕠 𝕓𝕪 𝕒𝕟𝕪 𝕞𝕖𝕒𝕟𝕤 𝕟𝕖𝕔𝕖𝕤𝕤𝕒𝕣𝕪.

    𝔹𝕦𝕥, 𝕥𝕙𝕖𝕣𝕖 𝕨𝕚𝕝𝕝 𝕓𝕖 𝕔𝕠𝕟𝕤𝕖𝕢𝕦𝕖𝕟𝕔𝕖𝕤 𝕗𝕣𝕠𝕞 𝕥𝕙𝕖 𝕣𝕠𝕦𝕥𝕖 𝕪𝕠𝕦 𝕥𝕒𝕜𝕖. 𝕎𝕙𝕚𝕔𝕙 𝕨𝕚𝕝𝕝 𝕞𝕒𝕜𝕖 𝕪𝕠𝕦𝕣 𝕤𝕦𝕣𝕧𝕚𝕧𝕒𝕝 𝕙𝕒𝕣𝕕𝕖𝕣!

    𝕐𝕠𝕦 𝕙𝕒𝕧𝕖 𝕥𝕙𝕖 𝕔𝕙𝕠𝕚𝕔𝕖 𝕥𝕠 𝕔𝕠𝕟𝕥𝕚𝕟𝕦𝕖 𝕒𝕟𝕕 𝕡𝕝𝕒𝕪 𝕥𝕙𝕖 𝕘𝕒𝕞𝕖. 𝕐𝕠𝕦 𝕞𝕒𝕪 𝕒𝕝𝕤𝕠 𝕤𝕒𝕪 𝕟𝕠, 𝕓𝕦𝕥 𝕪𝕠𝕦 𝕞𝕚𝕘𝕙𝕥... 𝕟𝕠𝕥 𝕣𝕖𝕥𝕦𝕣𝕟 𝕥𝕠 𝕪𝕠𝕦𝕣 𝕨𝕠𝕣𝕝𝕕.

    ℂ𝕠𝕟𝕥𝕚𝕟𝕦𝕖?

    𝕐𝕖𝕤☐ ℕ𝕠☐

    Language:
    English
    Words:
    3,116
    Chapters:
    1/?
    Comments:
    8
    Kudos:
    10
    Bookmarks:
    4
    Hits:
    122
  7. Tags
    Summary

    will add tags as I go - don't want to get too ahead of myself.
    err thank you for reading!!

    Language:
    English
    Words:
    12,595
    Chapters:
    4/?
    Comments:
    9
    Kudos:
    62
    Bookmarks:
    10
    Hits:
    568
  8. Tags
    Summary

    5 years passed since the barrier broke.

    And 3 years passed since Sans brought to his timeline other 10 skeletons.

    After so long they're settling fine, most of them have jobs, and who had problems with smoking or drugs or...other things, got help. They're better now, they're a family.

    But then they meet you, in the middle of the forest, scared, wounded and with a lot of secrets.

    Will their care and kindness go through you?

     

     

    ...well, their own way..of kindness

    Language:
    English
    Words:
    13,181
    Chapters:
    2/?
    Comments:
    5
    Kudos:
    37
    Bookmarks:
    16
    Hits:
    377
  9. Tags
    Summary

    You are an illegitimate child, the result of the love of a werewolf and a vampire. In the books, creatures like you were exalted above the rest, possessed of immense power and skill. But in reality, it's the opposite. Like your inability to digest blood, or your inability to use vampire hypnosis. And those are just some of the problems half-breeds like you have...

    Your family on your mother's side refused, couldn't accept you, so all your life you grew up under the wing of your father, who owned an elite vampire establishment in Ebott. Humans often went there to make unusual acquaintances or earn converts.

    So when word spread inside the club that one of the female customers, who owed your father a debt, refused to pay under the pretext that she got pregnant by her boyfriend, you became involuntarily interested. Because her boyfriend was a monster...

    Language:
    English
    Words:
    20,401
    Chapters:
    7/?
    Comments:
    49
    Kudos:
    267
    Bookmarks:
    58
    Hits:
    3392
  10. Tags
    Summary

    The Fell brothers are on the surface and out of the hellhole they call home. Edge has a good job and friends and hobbies. Red is still the piece of shit he's always been, but now he has Sans, who despite his best efforts to hide it is the best thing that ever happened to him.

    If Red would stop making excuses and allow himself something good for once, he could actually be happy for the first time in his life. But maybe he's right that everything is temporary. After all, in a world where there's still an undeniable tension between monsters and humans and everything can reset at any time, is it even worth getting attached? Is being happy, even just for a little while, worth the pain that comes with it if everything he loves is lost?

    Language:
    English
    Words:
    73,615
    Chapters:
    27/30
    Comments:
    345
    Kudos:
    284
    Bookmarks:
    49
    Hits:
    7206
  11. Tags
    Summary

    Now that Sans has escaped LOVE, Inc., he runs into some interesting people who help him navigate the strange world the humans have created above the surface. Running from the law, they face unprecedented challenges as they try to save the ones they love from an unethical medical institution and create a better world for themselves. Will Sans and Papyrus ever get to be happy? Will their future ever look bright?
    This story has very dark themes. Be mindful of the tags.

    A sequel to Blood and Bones.

    Series
    Language:
    English
    Words:
    1,427
    Chapters:
    1/?
    Kudos:
    5
    Hits:
    42
  12. Tags
    Summary

    The monsters are free from the underground, but they didn’t all make it. Papyrus, Sans younger brother is dead, leaving Sans to care for the two children he left behind. After a long night of work Sans finally relents and hires a nanny/housekeeper. Enter you, just another human down on her luck and running from her past. this job seemed like an easy way to pass the time and get paid until your past inevitably catches up to you. At least that’s what you thought until you started developing feelings for one ketchup loving skeleton. Now strange noises are coming from the shed at night and all these new ‘cousins’ keep turning up. Can you help Sans through his grief? What is he hiding? And what is with this new gaggle of skeletons?

    Language:
    English
    Words:
    15,935
    Chapters:
    5/?
    Comments:
    14
    Kudos:
    40
    Bookmarks:
    18
    Hits:
    735
  13. 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:
    16,858
    Chapters:
    19/30
    Comments:
    299
    Kudos:
    140
    Bookmarks:
    21
    Hits:
    2168
  14. 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:
    57,570
    Chapters:
    43/?
    Comments:
    185
    Kudos:
    591
    Bookmarks:
    103
    Hits:
    15169
  15. 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:
    51,181
    Chapters:
    9/26
    Comments:
    13
    Kudos:
    7
    Bookmarks:
    2
    Hits:
    208
  16. Tags
    Summary

    You are getting set up to go to the University of your dreams but sadly the dorm life isn't what you'd like for studying... so you go looking for an affordable place to stay. Finding an ad in the paper for everything you could want in a place only set back is they are looking for male applicants only... oh and the other tenants are monsters not that you mind. Maybe if you could go in person you can plead your case and oh my goodness they're all skeletons.

    Series
    Language:
    English
    Words:
    73,906
    Chapters:
    16/?
    Comments:
    415
    Kudos:
    1905
    Bookmarks:
    377
    Hits:
    42586
  17. Tags
    Summary

    Each scar spells a story.

    Red's body is a fucking omnibus.

    Series
    Language:
    English
    Words:
    2,668
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    23
    Bookmarks:
    3
    Hits:
    222
  18. Tags
    Summary

    Why did she take everything from him. She took their mom. She took the looks. She took the praise. She takes his friends! And finally, she's taking his skeletons.

    Language:
    English
    Words:
    7,810
    Chapters:
    6/?
    Comments:
    4
    Kudos:
    54
    Bookmarks:
    23
    Hits:
    800
  19. Tags
    Summary

    Dust had resigned himself to a life alone. Then his crush, Red, finally found him again. But Dust isn't Sans anymore. How will he fit into Underfell's Surface and Red's life?

    Language:
    English
    Words:
    9,714
    Chapters:
    8/?
    Comments:
    32
    Kudos:
    189
    Bookmarks:
    40
    Hits:
    2609
  20. Tags
    Summary

    You and your family have been free for five years. And it feels like a lifetime compared to that hell. It still doesn't feel real to you. You keep expecting to wake up and be in that fucking cell.

    But, you don't. You all got out, relatively safe and sound. You even had a real home now. No more scientists, self-proclaimed researchers, experiments, or punishments. You didn't live in a lab anymore, you lived in a big house deep within a forest. Everything was amazing and nothing could change that.

    Then you got some new neighbors. And one, in particular, was seemingly hellbent on getting you all to abandon your home. You may have never met them, but you already pitied the poor bastard for starting a war with you.

    Nobody fucks with your family and gets away with it. Nobody.

    Language:
    English
    Words:
    15,214
    Chapters:
    6/?
    Comments:
    25
    Kudos:
    149
    Bookmarks:
    41
    Hits:
    1290

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