1 - 20 of 40661 Works in Undertale (Video Game)

Pages Navigation

Listing Works

  1. Tags
    Summary

    You get sick.

    Fever dreams, memories, shenanigans, and the absolute, drop-dead worst of all betrayals - stealing onion rings - ensue.

    Language:
    English
    Words:
    1,624
    Chapters:
    1/1
    Kudos:
    3
    Bookmarks:
    1
    Hits:
    16
  2. Tags
    Summary

    The joys of being the only mage in an Underground society full of humans that wanted his head cut off, put on a stake, and burned... they were truly limitless. Being constantly targeted for harassment and always getting picked on for fights, having to constantly be on edge and defending himself and his abusive younger brother from the outside world that wanted them dead.

    On top of everything, he fucking hated his job.

    What he hates more is breaking a promise.

    What he hates a lot less is a skeleton monster that enters his life suddenly and changes it just as fast.

    Language:
    English
    Words:
    3,558
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    1
    Hits:
    26
  3. Tags
    Summary

    The world has been torn asunder by Shadow.

    And yet...

    Hope glimmers in your SOUL.

    Language:
    English
    Words:
    2,022
    Chapters:
    6/?
    Kudos:
    12
    Hits:
    140
  4. Tags
    Summary

    If someone had told the Bad Sanses a week ago that they would not only have an unwanted vacation but would also have turned into children, they would have dusted them off without hesitation. But now? They just wonder who they pissed off to endure this fate.

    Or:

    Nightmares gang gets the right body for their behavior and is delighted with a terrible babysitter.

    Series
    Language:
    English
    Words:
    32,024
    Chapters:
    14/?
    Comments:
    220
    Kudos:
    314
    Bookmarks:
    74
    Hits:
    5423
  5. Tags
    Summary

    Ripped out, ripped in half, thrown out the bathroom door. Forgotten, despite the pain it leaves in its place. It's just two pieces now, lifeless...

    But it refused.

    Language:
    English
    Words:
    4,996
    Chapters:
    8/?
    Comments:
    6
    Kudos:
    66
    Bookmarks:
    2
    Hits:
    999
  6. Tags
    Summary

    spamton goes to get a whoopper.

    Language:
    English
    Words:
    645
    Chapters:
    1/?
    Kudos:
    1
    Hits:
    10
  7. Tags
    Summary

    After suddenly appearing on a remote mountain a strange half skeleton half snake creature was sent to live in a zoo.

    This was all well and good before a kingdom of monsters burst from the mountain.

    How would a monster raised in a zoo adapt to living in a monster society?

    Series
    Language:
    English
    Words:
    22,394
    Chapters:
    17/?
    Comments:
    49
    Kudos:
    105
    Bookmarks:
    18
    Hits:
    1262
  8. Tags
    Summary

    Papyrus is invited along on a day trip to the beach with Apollo, Seravek and Pine, though he has some ulterior motives for picking such a secluded spot.

    Language:
    English
    Words:
    10,566
    Chapters:
    1/1
    Kudos:
    1
    Hits:
    16
  9. Tags
    Summary

    Being the most influential monster Dona has its perks... doesn't it?

     

    reader is a feline-monster!

    Language:
    English
    Words:
    2,400
    Chapters:
    2/?
    Comments:
    4
    Kudos:
    5
    Bookmarks:
    1
    Hits:
    26
  10. Tags
    Summary

    You're a trans artist and ended up as the roommate of Mettaton.

    Language:
    English
    Words:
    26,736
    Chapters:
    15/?
    Comments:
    25
    Kudos:
    71
    Bookmarks:
    12
    Hits:
    1356
  11. Tags
    Summary

    all Edge wants is for this to last forever

    he gets his wish

    Language:
    English
    Words:
    12,007
    Chapters:
    11/13
    Comments:
    92
    Kudos:
    59
    Bookmarks:
    8
    Hits:
    729
  12. Tags
    Summary

    I meant to die.

    I'm trying to gain my bearings and earn my place in this new world. At first I thought it was just so I would never have to go home, but maybe it's also so I can stay with the bizarre, slovenly mage I have come to care for.

    I've heard of soulmates... Could this be it?

    (Nah basically I have been obsessed with Undertale for far too long and I have far too many head canons, and I need to put them down. Switch the monsters for mages since I don't want to have to deal with ecto-peens, but basically this will be a drawn out romance between Sans and Y/N. I'm serious, they won't meet until a few chapters in and they won't be touching pinkies till we are at least in the double digits of chapters. I have elaborated on the basic world building Toby created and also build on his characters, so there's different sets of rules they play by, and the plot is pretty different from the game. Idk man I'm bad at selling my shit lol. Kinda rough subject matter, read the trigger warnings ok?)

    Language:
    English
    Words:
    52,115
    Chapters:
    16/?
    Comments:
    6
    Kudos:
    45
    Bookmarks:
    6
    Hits:
    707
  13. Tags
    Summary

    Asgore....born in a time of strife, as the sun rose. His Life would not be easy, there were ups and downs. he married Toriel, had his children... but there was so much more then those.

    In the 'We All have Stories' universe

    Series
    Language:
    English
    Words:
    88
    Chapters:
    1/?
    Kudos:
    1
    Bookmarks:
    1
    Hits:
    3
  14. Tags
    Summary

    On the first day of 6th-grade, Red Gaster meets Sans Serif. The two of them grow up together, become best friends, have adventures, discover a new species of monsters(?), and eventually fall in love. (It all feels really familiar.) It's a coming-of-age story that has (maybe?) happened before and (might?) happen again.

    In the vein of Catsitta's 100-word-a-day drabbles, this story will be told 250 words at a time with updates each day. It's best enjoyed in entire work mode.

    This is a PREQUEL (sort of? I guess it depends on how you look at time travel) to my first daily drabble, A Bitty Escape. This can be read on its own, but will probably be a whole lot more interesting if you check that one out first.

    Series
    Language:
    English
    Words:
    15,628
    Chapters:
    63/?
    Comments:
    983
    Kudos:
    107
    Bookmarks:
    12
    Hits:
    2651
  15. Tags
    Summary

    Humans have been banished to the underground after a brutal war between humans and monsters. Hero just wants to live happily with his siblings but everything seemed to change when a certain skeleton appears.

    Language:
    English
    Words:
    13,563
    Chapters:
    21/?
    Comments:
    37
    Kudos:
    58
    Bookmarks:
    7
    Hits:
    1602
  16. Tags
    Summary

    Just a warrior and Some horny wolf skeletons. Who will she choose, or maybe all of them.
    Three skeletons fighting to show they are worthy for their mate who in their eyes is an alpha.

    Language:
    English
    Words:
    3
    Chapters:
    1/1
    Bookmarks:
    1
    Hits:
    4
  17. Tags
    Summary

    Somewhere, somehow, they knew everything would be okay. Their soul was purple, after all.

    Series
    Language:
    English
    Words:
    11,717
    Chapters:
    9/?
    Comments:
    24
    Kudos:
    121
    Bookmarks:
    38
    Hits:
    1658
  18. Tags
    Summary

    DIRECT SEQUEL/EPILOGUE TO “PATCHWORK SOUL” — 3 months later. A family of monsters and their little human kid try to start life anew beyond the confines of a giant mountain. Maybe they find something. Maybe they lose something. Time flows ever onwards, but sometimes it goes sideways, and it's heavier than they thought.

    [Please read PATCHWORK SOUL, know all major canon timelines, and the music of Undertale before reading for the best experience.]

    [An extended AU of what happens after a specific time kid's True Pacifist ending.]

    Series
    Language:
    English
    Words:
    760,176
    Chapters:
    73/?
    Comments:
    417
    Kudos:
    265
    Bookmarks:
    19
    Hits:
    13987
  19. Tags
    Summary

    “Who are you? What are you?”

    “i am the sentient artificial neurological system, but the doc generally refers to me as s.a.n.s.”

    When Gaster dies unexpectedly, Papyrus accidentally unearths troubling secrets about the mysterious genius that was his father. Among them is an advanced ai named Sans. Why would he keep such an amazing invention hidden? What is Project ARTIFICE?

    And what exactly does it mean to be alive?

    Ambiguous Sans/Papyrus | 100 Word Drabbles | Scifi Drama

    Language:
    English
    Words:
    7,100
    Chapters:
    71/?
    Comments:
    478
    Kudos:
    307
    Bookmarks:
    14
    Hits:
    7422
  20. Tags
    Summary

    A human has fallen into the Underground, there is nothing new there. This human, however, carries a rarity unseen by monsters ever before. Gaster is determined to find out what makes this human different than all the others, but his sons get swept up into the experiment he tries to carefully craft away from them.

    Language:
    English
    Words:
    108,054
    Chapters:
    39/50
    Comments:
    232
    Kudos:
    266
    Bookmarks:
    43
    Hits:
    5185

Filters

Filter results:
Submit

Include

?
Include Ratings
Include Warnings
Include Categories
Include Fandoms
Include Characters
Include Relationships
Include Additional Tags

Exclude

?
Exclude Ratings
Exclude Warnings
Exclude Categories
Exclude Fandoms
Exclude Characters
Exclude Relationships
Exclude Additional Tags

More Options

Crossovers
Completion Status
Word Count
Date Updated
Submit

Pages Navigation