1 - 20 of 1929 Works in Alternate Universe - Underfell (Undertale)

Pages Navigation

Listing Works

  1. Tags
    Summary

    Frisk spares Sans.

    Language:
    English
    Words:
    1,542
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    20
    Hits:
    127
  2. Tags
    Summary

    One day you woke up in a body that is not your own with no memories of what happened before. You somehow ended up in a bar and met a few weird looking things that call themselves monsters. The weird fire one takes you in and you met a lot on interesting people- or well skeletons and other fire beings? God you wished you had your memories and a body that isn't 15 or so inches long.

    At least this fire one lets you stick around.

    Language:
    English
    Words:
    13,561
    Chapters:
    7/?
    Comments:
    91
    Kudos:
    197
    Bookmarks:
    34
    Hits:
    1995
  3. Tags
    Summary

    You're so kind. Too sweet for your own good, too selfless for this world.

    How have you even survived this long?

    He hates your unconditional kindness. He can't understand. He wants to dirty your pretty little face.

    But as time goes on, he finds that there's more to you than meets the eye.

    // Underfell!Sans/Reader // Post-barrier // If ya know me, ya know there's gonna be fluff // There will be violence // Hope you enjoy! //

    Language:
    English
    Words:
    16,369
    Chapters:
    8/?
    Comments:
    359
    Kudos:
    1011
    Bookmarks:
    161
    Hits:
    13847
  4. Tags
    Summary

    "Hello... everyone in the Multiverse.

    You've kinda caught me in a compromised position here so....

    My name is Ava.

    You don't know me but...I am your stalker.

    I spy on everyone.... In every universe.... To the extent that I've witness your entire lives and countless possible timelines.

    ...as far as first impressions go.... this destroyed city you see behind me...

    It was totally like this when I got here....

    Also, I understand that some people may feel uncomfortable... Even a little murdery...

    .... And I promise, the day I get tired of abusing your privacy for my own entertainment, I'll quit and go get a real life.

    But until that day... Yea... I'll know when you're sleeping, when you're awake.... and also, I'll be criticising your technique in bed.

    I have score boards ladies and gentlemen."

    Language:
    English
    Words:
    146,803
    Chapters:
    55/?
    Comments:
    1200
    Kudos:
    751
    Bookmarks:
    85
    Hits:
    10272
  5. Tags
    Summary

    When the timelines go on too long in resets outside forces take it upon themselves to end them forever... but things aren't exactly as they seem.

    First time posting a fic, I'm a terrible writer but here goes nothin.

    Series
    Language:
    English
    Words:
    79,428
    Chapters:
    25/?
    Comments:
    16
    Kudos:
    35
    Bookmarks:
    2
    Hits:
    408
  6. Tags
    Summary

    These are going to be --- GERMAN --- stories!!

    One Shots, Undertale and a lot of smut.

    Language:
    Deutsch
    Words:
    18,088
    Chapters:
    12/31
    Comments:
    2
    Kudos:
    18
    Bookmarks:
    1
    Hits:
    1186
  7. Tags
    Summary

    You moved to Mount Ebott to escape your mother and her expectations. You expected for there to be nothing of interest there. So what if there are legends about monsters and missing children. Lots of mountains have missing people. Yet...

    You've been having these odd dreams lately. Each one lands you in a place where the sun never seems to set and an alien white light shines from the skies. You've accepted a task that has put you against sixteen monstrous creatures known as the Keilaises, large skeletal creatures made out of stone, earth, and magic. From each of these guardians, you must retrieve a shard in order to complete your quest.

    You don't know if these dreams are real or not. With your sleepwalking issue becoming more and more frequent, these dreams seem to be out of control.

    ...What's this you say?

    You're saying that monsters have come down from the summit of Mount Ebott?

    ...Did your dream have something to do with this? Or are you just going crazy?

    Series
    Language:
    English
    Words:
    42,365
    Chapters:
    6/?
    Comments:
    58
    Kudos:
    106
    Bookmarks:
    29
    Hits:
    1251
  8. Tags
    Summary

    This is an ongoing interactive event on my Tumblr where my followers get to choose what happens in the story. The story revolves around securing dates (and maybe a kiss) from a skeleton or a Snowdin bartender in the chosen AU. The entire work will span multiple rounds of Undertale or AU visits and does have an overall plot.

    Language:
    English
    Words:
    34,051
    Chapters:
    43/46
    Comments:
    137
    Kudos:
    157
    Bookmarks:
    24
    Hits:
    3262
  9. Tags
    Summary

    Papyrus finds you when you have nowhere to go. Now you live with eight skeletons. You don’t mind this arrangement.

    Most of the time.

    Language:
    English
    Words:
    36,066
    Chapters:
    16/?
    Comments:
    283
    Kudos:
    366
    Bookmarks:
    66
    Hits:
    5037
  10. Tags
    Summary

    You own and pastry shop and eventually you fuck UF sans. That's probably about as far as this fic will go.

    Language:
    English
    Words:
    5,266
    Chapters:
    2/?
    Comments:
    16
    Kudos:
    62
    Bookmarks:
    9
    Hits:
    460
  11. Tags
    Summary

    Undyne ran; her footsteps echoed though the true lab. Papyrus was in her arms, looking scared, whom was feeble and very vulnerable to the rage of Sans.

    Unable to heart the extremely malnurished and weak skeleton dying just because she wanted to keep him, she opened the teleporter's door and put him inside the machine.

    She had enough time to scribble down a small note for Papyrus

    Hopefully one day our paths will cross again, Papyrus. Good luck, I'll miss you.

    With love, Undyne.

    Making sure it was neatly folded and put away in his jacket's pocket, she gave Papyrus a goodbye hug. She closed the door and latched it, going to the control panel and typing down some coordinates for, hopefully, the surface.

    Confirming it caused the already dim lights to flicker as the teleporter took in energy, and the humming got louder and louder as it started its jump. A blinding light- and then it was gone.

    Language:
    English
    Words:
    13,463
    Chapters:
    10/?
    Comments:
    36
    Kudos:
    111
    Bookmarks:
    12
    Hits:
    1608
  12. Tags
    Summary

    Side stories set in the same world as The World, Upside Down, highly recommend reading that before this. Tales of Frisk's life before and after coming to this new world, of the lives of monsters before Frisk arrived, and some from the lives of others in another world as well. UPDATES FREQUENTLY

    Series
    Language:
    English
    Words:
    258,589
    Chapters:
    46/?
    Comments:
    264
    Kudos:
    148
    Bookmarks:
    20
    Hits:
    3942
  13. Tags
    Summary

    Monsters came up from the underground a while ago, and are now a part of daily life. That doesn’t mean they have it easy, however. Coming up from the harsh life underground lead to another harsh life on the surface, where multiple groups of monsters have created a crime syndicate to rival the human ones that were already there.

    And then there’s you. You are a singer who works at a little whole-in-the-wall bar. You don’t have anything to do with the mafia, and are just trying to pay your bills. But of course, things don’t always go the way you want them to.

     

    UPDATE: The earlier chapters of this story are currently under construction. It has been edited up to chapter 1.

    Language:
    English
    Words:
    91,626
    Chapters:
    40/?
    Comments:
    620
    Kudos:
    804
    Bookmarks:
    124
    Hits:
    11760
  14. Tags
    Summary

    You and Sans discover a new kink

    Series
    Language:
    English
    Words:
    4,148
    Chapters:
    2/2
    Comments:
    10
    Kudos:
    47
    Bookmarks:
    3
    Hits:
    662
  15. Tags
    Summary

    In Ebott City, circumstances lead a few monsters who are so alike, but so different, to find each other.

    What do a teacher, a chiropractor, and a mechanic have in common? We're about to find out, in most intimate detail.

    Series
    Language:
    English
    Words:
    88,549
    Chapters:
    19/?
    Comments:
    187
    Kudos:
    181
    Bookmarks:
    30
    Hits:
    2313
  16. Tags
    Summary

    In Ebott City, circumstances lead a few monsters who are so alike, but so different, to find each other.

    What do a teacher, a chiropractor, and a mechanic have in common? We're about to find out.

    Series
    Language:
    English
    Words:
    77,156
    Chapters:
    19/?
    Comments:
    74
    Kudos:
    133
    Bookmarks:
    19
    Hits:
    1449
  17. Tags
    Summary

    Sometimes Slim can only find peace at the edge of a knife, and Red is willing to wield it.

    Language:
    English
    Words:
    1,516
    Chapters:
    1/1
    Kudos:
    11
    Hits:
    66
  18. Tags
    Summary

    Monsters returning to the surface was just another reason to avoid leaving the apartment besides your sometimes crippling social anxiety. But even a recluse who often slept through normal breakfast hours and forgot to eat lunch ran out of milk and toilet paper.

    Language:
    English
    Words:
    30,037
    Chapters:
    11/?
    Comments:
    191
    Kudos:
    424
    Bookmarks:
    79
    Hits:
    3921
  19. Tags
    Summary

    Have some Error Oneshots to either warm your heart and make you smile or clench your SOUL and make you cry!
    Sub!Error x Anyone

    (AUs or characters doesn't belong to me unless I said so. Undertale belongs to the one and only Toby Fox, and it's AUs belongs to their wonderful creators out there. I only own the story and the plot. The characters' characteristics will change and be altered for the sake of each and every story.)

    Language:
    English
    Words:
    20,421
    Chapters:
    10/?
    Comments:
    29
    Kudos:
    97
    Bookmarks:
    10
    Hits:
    1906
  20. Tags
    Summary

    The world of Underfell is a dangerous place but some clever maneuvering has given Grillby a rather impressive amount of shall we say 'invincibility'. Papyrus on the other hand, now Captain of the Guard isn't going to stand for anyone messing with his brother and fully intends to use the bartender's own tricks against him.

    Language:
    English
    Words:
    9,837
    Chapters:
    1/?
    Comments:
    4
    Kudos:
    8
    Bookmarks:
    1
    Hits:
    87

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