1 - 20 of 7073 Works in Undyne (Undertale)

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  1. Tags
    Summary

    By author fiat, another self insert is thrown into the pits of the Underground.

    Confused and hurt, he finds that the Underground is no longer what it once was.

    Friends old and new are all alive at the same time.

    His foreknowledge proven useless, now he remains at the end of a long cycle of RESETS.

    This is...a new run...

    Language:
    English
    Words:
    4,208
    Chapters:
    1/?
    Hits:
    0
  2. Tags
    Summary

    You, who have a questionable job, a mysterious past, weird abilities, and a few bad habits. Him, a laid back skeleton who's not so mildly suspicious of you. And, of course, the wacky people surrounding you. What else could you want in life?

    Language:
    English
    Words:
    31,260
    Chapters:
    23/?
    Comments:
    20
    Kudos:
    110
    Bookmarks:
    20
    Hits:
    1697
  3. Tags
    Summary

    Monsters hire a teacher for human history.

    Language:
    English
    Words:
    37,485
    Chapters:
    19/?
    Comments:
    2
    Kudos:
    49
    Bookmarks:
    6
    Hits:
    1080
  4. Tags
    Summary

    You worked with bacteria. Grew it, cultured it, studied it. Monsters breaching the surface meant you had a lot of new testing to do. At the end of a long slew of tests you find yourself in a casual Italian restaurant with a craving for carbs and find yourself taking care of a large skeleton who introduces you to some new friends.

    You only hope no one gets hurt.

    Language:
    English
    Words:
    29,802
    Chapters:
    13/?
    Comments:
    169
    Kudos:
    297
    Bookmarks:
    50
    Hits:
    2821
  5. Tags
    Summary

    Once upon a time humans and monsters went to war.
    Once upon a more recent time Papyrus' brother Sans got a promotion. And now Papyrus was off to buy him a human toy, pet, simple plaything...
    Humans and Monsters. That was all that was important. Humans and Monsters. Just supposed to be a week of fun. One's hell being another's heaven. Humans and Monsters. It's just the way things go. Her hell, their heaven.
    ....... but something's wrong.
    It's not the way it goes at all.
    And you may think the worse person can't change.
    Because LOVE and hurting are a cycle.
    But hope and Mercy are too.
    You just have to keep finding ways to stay determined.
    Even when it seems impossible and hard, and Mercy apparently seems spent.

    (Swapfell Surface AU) (kinda Swapfell) (mostly Swapfell)

    Language:
    English
    Words:
    203,424
    Chapters:
    58/?
    Comments:
    338
    Kudos:
    159
    Bookmarks:
    13
    Hits:
    5223
  6. Tags
    Summary

    Aquamarine: a light blue gemstone, that is calming, soothing, and cleansing. It inspires truth, trust and letting go. A person comes into the lives of Sans and Papyrus. They did not expect, nor want what came, but in the end, they were better for it. They discovered an Aquamarine.

    Language:
    English
    Words:
    5,809
    Chapters:
    1/?
    Kudos:
    8
    Bookmarks:
    1
    Hits:
    36
  7. Tags
    Summary

    Six Months after the barrier is broken, you are summoned to Ebott City. The quarantined hub of monster activity and a short drive away from their old home. You're a decorated engineer and you've been offered the opportunity of a lifetime. You will be the first human allowed to study monster technology, how it interacts with this so called "magic", and access to the greatest geothermal energy plant in the world, The Core. This could easily be the biggest win for renewable energy in your lifetime, or is it..? There's a hidden danger underground, and it will threaten everything you know and love. You're not much of a fighter but can you outsmart the ghosts under the mountain?

    Language:
    English
    Words:
    5,008
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    6
    Hits:
    25
  8. Tags
    Summary

    The year is Anno Domini 11944. For centuries upon centuries android soldiers created by humans have fought against mechanical lifeforms of alien origin. To break the stalemate of the Fourteenth Machine War, YoRHa, an elite military force, strikes from an orbital base to retake the surface of the Earth for humanity.

    But to a forgotten kingdom of creatures deep beneath an unexplored mountain somewhere on the desolate Earth, the space-borne entities strewn across the planet fighting for dominance may as well not exist at all. The monsters under King Asgore's rule long for freedom and retaliation against the humans who condemned them to their prison, unaware that the world outside has moved on.

    For 2B and 9S, two YoRHa soldiers trapped in an endless cycle of death and despair, this kingdom and its strange inhabitants may prove to be a sanctuary... if they can stop their past from catching up to them.

    And the past is much closer than it seems...

    Routes Complete:

    flowering [A]ntipathy (1-4)
    the [B]est is yet to come (5-8)
    lingering [C]urse (9-19)
    promise of another worl[D] (20-29)

    Series
    Language:
    English
    Words:
    311,752
    Chapters:
    52/?
    Comments:
    1018
    Kudos:
    174
    Bookmarks:
    29
    Hits:
    6880
  9. Tags
    Summary

    Frisk was only doing what she had to. It wasn't her fault every monster in the Underground wanted her dead.

    Language:
    English
    Words:
    14,337
    Chapters:
    8/8
    Comments:
    2
    Kudos:
    16
    Bookmarks:
    4
    Hits:
    332
  10. Tags
    Summary

    Asriel Dreemurr thought that all his problems would be solved when he came back to life, but life isn't that simple. His resurrection by Gaster sets off a series of events that shake up his and everyone else's lives. He'll have to deal with that while growing up on the surface with Frisk and all the problems that come with it. And his dark past as Flowey isn't done with him just yet.

    All will appear Out of the Void.

    Series
    Language:
    English
    Words:
    46,674
    Chapters:
    14/?
    Kudos:
    3
    Bookmarks:
    3
    Hits:
    41
  11. Tags
    Summary

    You never wanted to be here in the first place, where monsters are trapped underground, drove to insanity by starvation. You're starving but something about the food isn't right. You're tired but you couldn't afford to stay in one place, less one tries to kill you.

    You expected you would get caught. Then brutally murdered. But you didn't expect the skeleton monster to take that kind of interest in you so quickly.

    "hey...now that I get a good look at 'cha," he trails a phalange down your cheek softly. He chuckles.

    "you're kinda cute. for a scrawny lil' human. "

    What Is happening to your life?

    [Horrortale!G!Sans/You]
    (One-sided At first)
    SourApple Studios vers
    Underpatch Au (c) to Borurou

    Language:
    English
    Words:
    9,167
    Chapters:
    12/?
    Comments:
    117
    Kudos:
    472
    Bookmarks:
    56
    Hits:
    6791
  12. Tags
    Summary

    Eight skeletons, one crazy world, drama and incest; my, what could possibly go wrong?

    Language:
    English
    Words:
    77,378
    Chapters:
    27/39
    Comments:
    27
    Kudos:
    44
    Bookmarks:
    4
    Hits:
    1172
  13. Tags
    Summary

    Pj gets dared to ask Y/n to prom but ends up falling in love.

    Language:
    English
    Words:
    1,290
    Chapters:
    7/7
    Comments:
    22
    Kudos:
    31
    Bookmarks:
    1
    Hits:
    834
  14. Tags
    Summary

    Stories!
    One shots?
    MOAU <— XD
    Discontinues...
    *challenges ‘n’ prompts*
    ‘Requests’
    Story outlines = (Ideas & Concepts)
    ———
    102 = 30 Day Winter Challenge - Day #1: Sweaters

     

    ———

    MOAU = My Own Alternative Universe

    Language:
    English
    Words:
    101,216
    Chapters:
    102/?
    Comments:
    298
    Kudos:
    101
    Bookmarks:
    5
    Hits:
    1858
  15. Tags
    Summary

    The real story...

    Series
    Language:
    English
    Words:
    24,652
    Chapters:
    4/?
    Comments:
    60
    Kudos:
    13
    Bookmarks:
    2
    Hits:
    228
  16. Tags
    Summary

    You watched him unwrap his lunch, pouting.

    “C’mon, man. Not even a bite?” He started eating and you groaned dramatically. “I’m starving. I’m dying right in front of you. You’re killing me, Papyrus.”

    “good,” he muttered around a mouthful of food.

    “Wow, rude. I have no idea why we’re friends.” You sighed, eyeing the glittery burrito.

    “because you like to mooch off of me,” Papyrus snorted. He finished it off, cracking a grin when you whined in distress. “besides, y’know i only eat this because m’lord made it. he can always tell when i give it away. i’ll get ya something from a food truck later.”

    You nearly cried. “Thank you! I swear, I’ll pay you back when I’m a millionaire.”

    “so, never?”

    “I’ll try.”

    Papyrus shook his head with a grin, reaching out to pat your head. “guess that’s better than nothing.”

    You beamed, soaking up the affection. Papyrus always had your back.

    But… you were still so hungry. You worried that soon, food trucks wouldn’t be enough. Nothing would.

    ...
    arc one: The Happiest Town in Town | chapters 1-??, in-progress
    ...

    Language:
    English
    Words:
    20,835
    Chapters:
    18/?
    Comments:
    245
    Kudos:
    378
    Bookmarks:
    67
    Hits:
    3546
  17. Tags
    Summary

    In the wake of the death and destruction the human has caused, much like the passage of a hurricane, Alphys looks over the kingdom that has somehow become her responsibility. As Sans listens, she attempts to work out her hopes and regrets, forgotten and remembered, about it all--and all everyone, especially she, has lost.

    Language:
    English
    Words:
    2,412
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    24
    Bookmarks:
    4
    Hits:
    91
  18. Tags
    Summary

    Sans had grown up with those words on his bones. 'That was absolutely HILARIOUS'.

    He would be lying if he said that those words didn't help shape his sense of humor. He couldn't wait to crack the right joke that would let him know that he had found his sarcastic soulmate. If the writing was anything to go by, they were either as genuine as Papyrus, or really sarcastic.

    Either way, he couldn't wait to finally find you.
    ---------
    You had been searching for your soul mate for ages. You had almost given up at this point. You stared at your arm, where the words were written in some lettering that was, honestly, kind of childish. 'i thought it was pretty funny.' You had no idea why all the words were lowercase.

    From what you could tell, he was a joker. That much was obvious, but the case was puzzling. Everyone else you know has proper grammar, at least for the most part. You did run into an upbeat girl who had these weird squiggles after hers.

    Maybe it's for inflection? You weren't really sure.

    Language:
    English
    Words:
    3,074
    Chapters:
    4/?
    Comments:
    24
    Kudos:
    123
    Bookmarks:
    23
    Hits:
    1215
  19. Tags
    Summary

    There is no easy way to put this.

    You had problems.

    A LOT of problems.

    And that's ok.

    And do you know who is going to fix those problems?

    Why Sans of course!

    Language:
    English
    Words:
    3,811
    Chapters:
    3/?
    Comments:
    5
    Kudos:
    64
    Bookmarks:
    10
    Hits:
    405
  20. Tags
    Summary

    Everyone knew that those with impossibly blue eyes had the power of those who loved them, and that those with red eyes have the ability to SAVE and LOAD due to having learned magic. Just as everyone knew that those born with demon eyes are damned to the worst fate: to never get what you desire most in your life. For Frisk, they knew they would never get the full acceptance of their world, and for Asriel, it was to have a sibling he could watch grow up. For Lulu? She wanted to see the world burn.

    Series
    Language:
    English
    Words:
    1,451
    Chapters:
    1/?
    Hits:
    7

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