1 - 20 of 42,360 Works in Sans (Undertale)

Navigation

Listing Works

  1. Tags
    Summary

    After a mysterious entity threatens the universe, everyone from multiple realms fight to stop it, while others succumb to the pleasures it brings. Chapter one brings us to our first realm, the mushroom kingdom, and shows just exactly what the void brings (its sex idk man.). Also luigi and sans fuck in this one but lmk if i rushed into it i got a little excited writing and i know its super short but its just a concept piece but yeah super hyped to see how this goes!

    Language:
    English
    Words:
    645
    Chapters:
    1/1
    Hits:
    1
  2. Tags
    Language:
    English
    Words:
    1,028
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    2
    Hits:
    4
  3. Tags
    Summary

    Much as you like animals, you aren't afraid to snuff one out. And when the door’s left unlocked, you let yourself in with the surety that this here cock-holster understands that.

    Should know his future consists of a bit in the teeth and a grave to match.

    Yup, monsters have invaded your home: high-ranking royal steppers, dark romantics, and base shittery that has said neighborhood of yours alive with protest. You just got out of jail, and now you gotta make another mess.

    In your own house, no less. Just awful. Plain and awful, it is.

    ***
    An unconventional menace of a reader becomes hell-bent on enacting revenge over the skeleton that took her house. And later runs over a guy and his dog.

    (chapters are subject to change; updates done every other week).

    Language:
    English
    Words:
    31,473
    Chapters:
    12/?
    Comments:
    42
    Kudos:
    39
    Bookmarks:
    6
    Hits:
    985
  4. Tags
    Summary

    WIP fic! You find yourself in the Void. Yikes. Maybe a certain group of bad skeletons will take interest..? Loosely based on the song Ghosting by Mother Mother. (Written in 3rd person!) Error doesn't come into the story until a bit later.

    Language:
    English
    Words:
    7,499
    Chapters:
    6/?
    Comments:
    2
    Kudos:
    6
    Bookmarks:
    1
    Hits:
    27
  5. Tags
    Summary

    In 1994, a rare species of beetle was discovered on Mount Ebbott and in the surrounding forest. As such, an exclusion zone was set up around the mountain, with a private military company enforcing it, all to protect this novel insect. (This had nothing to do with the numerous missing person reports that involved someone disappearing after climbing the mountain.) In the twenty-two years since the zone was set up, no one has disappeared on Mount Ebbott.

    That is, until now.

    Except it's not Frisk.

    Language:
    English
    Words:
    2,096
    Chapters:
    1/?
    Hits:
    4
  6. Tags
    Summary

    Trading her freedom away for the safety of another, this book loving woman finds herself in a strange castle, guarded by the castle’s inhabitants. Unbeknownst to her, these four have another fate in mind for her… they’d agreed to her deal in hopes that she could break their master’s "curse".

    With a heart as firmly guarded as their realm, the dark beast that reigns over the castle is resigned to a future alone and unloved. With a job as nasty as his self image, there’s no way this kind stranger could ever care to look upon him… right? Can a caring hand light a fire in this realm of permanent midnight?

    A tale as old as time, told in a new way.

    Language:
    English
    Words:
    173,986
    Chapters:
    46/?
    Comments:
    422
    Kudos:
    103
    Bookmarks:
    30
    Hits:
    4,127
  7. Tags
    Summary

    29 days of short stories based on the Febuwhump 2026 prompts, written every day, on the day. Chapter Index inside with Prompts, Summaries, Major Characters & Warnings for each day

    DAY 25: ALT - Live Broadcast
    Mettaton
    Everyone was watching. But that didn’t matter anymore.

    Language:
    English
    Words:
    29,386
    Chapters:
    26/30
    Comments:
    14
    Kudos:
    19
    Bookmarks:
    1
    Hits:
    358
  8. Tags
    Summary

    Error no teme a las personas.
    No teme a las caras.
    No teme a las voces.
    Teme al contacto.

    No al dolor,
    al contacto.
    A la invasión del espacio propio.
    Al toque que llega sin aviso.
    A la presión que no pidió y no controla.
    El Anti-Void no lo abrazó.
    Lo vació.
    Silencio absoluto.
    Distancia infinita.
    Nada tocando nada.
    Allí no existen manos.
    No existen cuerpos.
    No existe cercanía.
    Por eso el tacto es interferencia.
    Es glitch en la señal.
    Es amenaza directa al sistema.

    ...

    Nightmare no inicia contacto.
    No por respeto.
    No por cuidado.
    Por cálculo.
    Invadir genera resistencia.
    Resistencia rompe utilidad.
    Y Nightmare no rompe herramientas útiles.
    Observa.
    Aprende.
    Espera.

    ...

    Dos criaturas rotas no se reconocen por lo que son.
    Se reconocen por lo que pueden tolerar sin destruir al otro.
    Y todavía no saben
    que van a tolerarse
    mucho más
    de lo que era seguro.

    Series
    Language:
    Español
    Words:
    6,215
    Chapters:
    13/?
    Comments:
    1
    Kudos:
    1
    Bookmarks:
    1
    Hits:
    22
  9. Tags
    Summary

    Sans was lonely. Sans wanted hotdog. Sans met Hotdog. Sans married Hotdog. Then was killed. Papyrus is gay.

    Language:
    English
    Words:
    183
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    1
    Hits:
    7
  10. Tags
    Summary

    Wake up buried in snow, alone, and with no memories?
    Check.

    Keep seeing numbers, words, and random text floating around every object and surface as far as the eye can see?
    Also check.

    Why does every person he meets say he needs help?!
    He’s perfectly fine, if you ask him.

    “I wonder what determination tastes like.”

     

    ---

    Note from the author:
    This is my take on Fatal Error — a much more non-canon,[this isn’t even OOC, this is just straight-up a different person with the same name]
    amnesiac version of him.
    He’s also not fully canon-compliant in terms of power scaling and may even have a different origin and and backstory.

    It’s my reimagining of him with a completly diffrent story.

    Language:
    English
    Words:
    79,898
    Chapters:
    46/?
    Comments:
    372
    Kudos:
    357
    Bookmarks:
    70
    Hits:
    9,120
  11. Tags
    Summary

    Undertale if Mt. Ebbot was in Gravity Falls
    Credits go to Collin64 on Fandom for the concept (thank you for letting me write this!)
    Everyone in this fic is queer. There is not a single straight person. This is my choice get over it

    Mabel looked ahead nervously, watching her brother tie a thick length of rope to a small sapling. "Dipper, are you sure we'll be able to get out again?"

     

    Dipper was fiddling with the rope, trying to stop it from falling out of his bag. "Yes! I'll tie the rope securely to this tree! That way, we'll be able to climb back up!"

     

    Mabel nodded unsurely, but she wanted to trust her brother. She held onto the rope, bracing herself to climb. Dipper followed her, and they made their way precariously down. They got around 50 meters, most of the way, when they heard a crunching noise, and fell through the air, into the mountain.

    Language:
    English
    Words:
    604
    Chapters:
    1/1
    Hits:
    7
  12. Tags
    Summary

    Turns out it's hard to put a new puzzle piece into an old set of puzzles.

    Or, at least that's how twelve-year-old Papyrus likes to think of moving into New Home with his older brother, Sans.

    Because, despite his greatest efforts, no one wants to be his friend.

    Language:
    English
    Words:
    2,968
    Chapters:
    1/?
    Hits:
    3
  13. Tags
    Summary

    Being half demon and half human was hard. It affected your life in interesting and traumatic ways. Luckily for you, you had a pair of skeletons who would help you through whatever life threw your way. Only, things got more complicated when different versions of them began to show up.

    Series
    Language:
    English
    Words:
    7,096
    Chapters:
    7/?
    Comments:
    24
    Kudos:
    75
    Bookmarks:
    26
    Hits:
    1,863
  14. Tags
    Summary

    One day, the severe bullying Frisk has to endure is just too much.

    As Frisk's body gives up and she passes out in the hallway, a skeleton teleports just in time to witness the fall.

    Language:
    English
    Words:
    3,018
    Chapters:
    3/?
    Kudos:
    13
    Bookmarks:
    2
    Hits:
    152
  15. Tags
    Summary

    Sans should have been the one telling everybody to evacuate during the earthquake, but no. He wasn't patrolling at that time. What else could you expect from him?

    The worst thing? Your puzzles are broken, and no one seems to care.

    The worst WORST thing? The flower that got tangled in the wires is telling things that must be untrue!!!!

    Language:
    English
    Words:
    2,323
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    1
    Hits:
    14
  16. Tags
    Summary

    Lust as the main character trying to play heroes while only attracting trouble. He wants to get better but a little birdy we can call Swad has been making it hard to get better.

    (This whole fanfiction is based on a roleplay done on OCSN originally with the exception of elements that are personal/proper to Lust.)

    Language:
    English
    Words:
    141,638
    Chapters:
    36/?
    Comments:
    18
    Kudos:
    16
    Bookmarks:
    1
    Hits:
    422
  17. Tags
    Summary

    AAAHHHHHHH

    I'm hyperfixating on undertale rn and so is my friend 😎
    So I'm writing us into the aus. This is NOT to be taken seriously, it's just something I made for US. 😋🫶

    CHAOS ENSUES‼️‼️

    Language:
    English
    Words:
    17,058
    Chapters:
    8/?
    Comments:
    7
    Kudos:
    7
    Hits:
    194
  18. Tags
    Summary

    first post. ive decided to start with a collection of oneshots about what i think different characters would do at a ren faire, starting with undertale and hopefully expanding
    im still working on it

    Language:
    English
    Words:
    50
    Chapters:
    1/1
    Kudos:
    1
    Hits:
    2
  19. Tags
    Language:
    Español
    Words:
    51
    Chapters:
    1/2
    Kudos:
    1
    Hits:
    14
  20. Tags
    Summary

    The genocide route ended in a bright hallway.

    Sans lost...

    And something followed the reset.

    Itsuka Shidou begins to experience dreams that aren't his, instincts he never learned, and reactions no human should possess. As Spirits descend and spacequakes tear his world apart, an unseen presence watches from inside his mind-silent, tired, and all too familiar with death.

    This time, there are no resets.

    Judgment comes after zero.

    Language:
    English
    Words:
    83,027
    Chapters:
    12/?
    Kudos:
    7
    Bookmarks:
    1
    Hits:
    137

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

Clear Filters

Navigation