1 - 20 of 1616 Works in Underswap Sans (Undertale)

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  1. 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:
    33,695
    Chapters:
    137/?
    Comments:
    1813
    Kudos:
    83
    Bookmarks:
    11
    Hits:
    2850
  2. Tags
    Summary

    Welcome back >:)

    Series
    Language:
    English
    Words:
    2,924
    Chapters:
    26/26
    Comments:
    39
    Kudos:
    27
    Bookmarks:
    1
    Hits:
    355
  3. 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:
    407
    Kudos:
    1865
    Bookmarks:
    371
    Hits:
    41832
  4. Tags
    Summary

    Chrysanthemums have many meanings. Bad dreams, horrid luck and in some cases they bring nausea and hallucinations. Or so Nightmare is told, but it has other underlying meanings as well, happiness, love, joy, excitement, which meaning will he fall under? Will the flower be a symbol of love, or despair. 

    A slowburn Killermare/Kight/NightKiller AU. Bad Sanses and Star Council will be included in the story. 

    Expect updates once a month.

    Language:
    English
    Words:
    7,457
    Chapters:
    2/?
    Comments:
    6
    Kudos:
    21
    Bookmarks:
    2
    Hits:
    164
  5. Tags
    Language:
    English
    Words:
    356
    Chapters:
    1/?
    Hits:
    4
  6. 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:
    3
    Kudos:
    52
    Bookmarks:
    24
    Hits:
    767
  7. Tags
    Summary

    Are you up to some sin today? These two totally are!
    NSFW Underswap Papara, grown ups only!
    Eventually FRANS!
    Updates every two weeks, usually on weekends.
    Liked what you read? COMMENT! (that's my one and only payment)

    Language:
    English
    Words:
    60,369
    Chapters:
    30/?
    Comments:
    53
    Kudos:
    58
    Bookmarks:
    4
    Hits:
    2262
  8. 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:
    10,943
    Chapters:
    4/?
    Comments:
    12
    Kudos:
    34
    Bookmarks:
    10
    Hits:
    548
  9. 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:
    6,686
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    23
    Bookmarks:
    11
    Hits:
    164
  10. Tags
    Summary

    Everyone knows the Star Sanses: they're the Guardians of the Multiverse, and protect it from Nightmare and his minions, who only want to spread chaos and destruction.
    They're kind, strong, brave, the good guys!
    How can you not love them?

    You can't. They deserve the world. They're perfect and selfless and precious, and must be protected at any (and I do mean ANY) cost. Not that they couldn't protect themselves, of course! It's just, the Multiverse doesn't give them the appreciation and respect they deserve, not really.
    But Nightmare, Error, Horror, Killer, Dust, Cross... they know how much Dream, Ink and Blue are worth.
    And they'll keep them safe.
    Forever.

     

    The credit of this story partially belongs to Stargazer_Nebula, who created a prompt on AO3 and helped me flesh out the story before I started writing.
    If you're interested, you can check out the comment chain where we discuss ideas here: https://archiveofourown.org/works/31988677/chapters/90524200
    The story is also cross-posted on Wattpad.

    Language:
    English
    Words:
    44,710
    Chapters:
    11/?
    Comments:
    194
    Kudos:
    233
    Bookmarks:
    38
    Hits:
    4518
  11. Tags
    Summary

    After 8 years of not returning underground, Frisk is beaten by his own guilt, until he meets Y/n, where the two are forcefully pushed into an adventure that has everyone's head in a whirl. When a new timeline arises with the help of, four humans and monsters to stop a future Armageddon, who's to say nothing will go wrong?

    Language:
    English
    Words:
    73,168
    Chapters:
    8/?
    Comments:
    25
    Kudos:
    68
    Bookmarks:
    16
    Hits:
    920
  12. Tags
    Summary

    Blue was in a mood, and everyone could tell. The conjoined bond mate tried her best to make him happy. And by try her best, she pestered him until he exploded and stormed off. But wait! Who's this mysterious skeleton stepping out of the machine they need to get home? And why does she have a baby?!

    Language:
    English
    Words:
    7,964
    Chapters:
    6/?
    Comments:
    15
    Kudos:
    116
    Bookmarks:
    31
    Hits:
    1209
  13. Tags
    Summary

    What could go wrong, breeding the rare specimens of the skeleton monster species?

    Language:
    English
    Words:
    2,019
    Chapters:
    1/3
    Collections:
    1
    Comments:
    1
    Kudos:
    8
    Bookmarks:
    1
    Hits:
    57
  14. 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:
    19,299
    Chapters:
    6/?
    Comments:
    10
    Kudos:
    14
    Bookmarks:
    5
    Hits:
    315
  15. Tags
    Summary

    Cold

    Icy needles piecing my skin, water all around me, I’m drowning

    Harsh snow as far as I can see, I’m shivering

    Crazed bloodthirsty eyelights, I’m fleeing

    Cold unyielding metal buried into my chest, I’m dying

    Unfeeling empty void, I’m not the same person I once was

    Language:
    English
    Words:
    32,524
    Chapters:
    19/?
    Comments:
    45
    Kudos:
    136
    Bookmarks:
    41
    Hits:
    3126
  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:
    94,354
    Chapters:
    55/?
    Comments:
    723
    Kudos:
    1133
    Bookmarks:
    231
    Hits:
    33743
  17. Tags
    Summary

    The FGoD and FGoC Multiverses clash. FGoD!Error and FGoC!Ink meet, deciding to work together to stop their enemies; FGoC!Error and FGoD!Ink. In all their time spent together, they begin to develop feelings for the other...

    Little do they know, though, amidst all their planning, FGoC!Error and FGoD!Ink have realised their plans.

    "As if you're the only one who can make alliances," FGoC!Ink whispers.

    Language:
    English
    Words:
    161
    Chapters:
    1/?
    Comments:
    8
    Kudos:
    7
    Bookmarks:
    1
    Hits:
    77
  18. Tags
    Summary

    You are the only butler (or worker in general) that serves for the Skeletal Household. It’s a skele-ton of work, but you manage by keeping onto a fairytale dream.

    Language:
    English
    Words:
    7,615
    Chapters:
    2/?
    Comments:
    4
    Kudos:
    15
    Bookmarks:
    1
    Hits:
    183
  19. Tags
    Summary

    "Don't be surprised if this doesn't end the way you want it to."

    "Oh do not worry, it will. This is what brought them here, and if it wants them back, who am I to stop it?"

    He only worries for their safety, but who is he to judge the other's decision?

    A malfunction of this magnitude is improbable, but not impossible:
    That was when they saw it, two beings, one larger and one smaller. While the machine had once spat out skeletons on a regular basis, it was deemed derelict after the last two came through over 6 months ago. It seemed other universes lacked the means or the will to travel elsewhere, thus it was shut off for good; the safety of the skeletons and the city was considered more important than the possibility that untamable beings traveled through. How could it have produced two more if it was unplugged? And why had it exploded in the first place, it was unpowered! All of their minds filled with fear, curiosity, and gloom.

    Language:
    English
    Words:
    28,966
    Chapters:
    11/?
    Kudos:
    7
    Bookmarks:
    1
    Hits:
    325
  20. 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:
    54,615
    Chapters:
    42/?
    Comments:
    182
    Kudos:
    585
    Bookmarks:
    107
    Hits:
    14873

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