1 - 20 of 3684 Works in Alternate Universe - Underfell (Undertale)

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  1. 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:
    6,639
    Chapters:
    2/?
    Comments:
    3
    Kudos:
    12
    Bookmarks:
    3
    Hits:
    133
  2. Tags
    Summary

    You’re overworked and in need of some vacation time. This however was not what you had in mind. Buckle up buttercup, you’re in for one heck of a ride.

     

    Oh, why, hello there! And who might you be? Ah, the reader! Hahaha! How delightful! Will you be joining us on our little- V̷͔̞̹̊͆ả̷͈̫̃͜c̸̛͖͂a̸͈̾͝͝t̷̤̦͑̾̕i̷͖̝̦͛̃͠ỏ̷̻͆n̸̬͎̽͘? Oh, our destination? Yes, of course. You enjoy Undertale do you not? Never mind, no need to answer that. Of course you do. Silly question, my apologies. Well, we mustn’t dawdle, then, come along and enjoy your much deserved V̷͔̞̹̊͆ả̷͈̫̃͜c̸̛͖͂a̸͈̾͝͝t̷̤̦͑̾̕i̷͖̝̦͛̃͠ỏ̷̻͆n̸̬͎̽͘.

    Language:
    English
    Words:
    52,937
    Chapters:
    15/?
    Comments:
    164
    Kudos:
    158
    Bookmarks:
    39
    Hits:
    2344
  3. Tags
    Summary

    Sometimes, you liked to imagine that Frisk was this kind and sweet because of you.
    That, maybe, you had lived up to your promise of being the best sister you could be when they were first born.
    That you taking the brunt force of your abusive father’s hits and drunk mother’s curses was worth it.

    You had protected them from the reality of your family and… you knew that you had to protect them now.

    You were Determined… To stay Kind.

     

    Arc 1 - Chapters 1-18
    Arc 2 - One Shots 19-22
    Arc 3 - Entries 23-36
    Arc 4 - Chapters 37-??

    Language:
    English
    Words:
    204,299
    Chapters:
    40/?
    Comments:
    321
    Kudos:
    1198
    Bookmarks:
    220
    Hits:
    21074
  4. Tags
    Summary

    Error can't, he just can't. ∂̶̣͉͒̈́̉̈́̕ß̸̆∂̶̣͉͒̈́̉̈́̕ß̸̆ is ruining his life. He doesn't want to do this forced job anymore. He can't take it anymore, he just wants everything to be over.

    ∂̶̣͉̯̲̳͒̈́̉̈́̕ß̸̆∂̶̣͉̯̲̳͒̈́̉̈́̕ß̸̆ found out and Error is terrified for what's to come.

    More for the ones he told then for himself.

    Ink realises he's not the only one suffering from ∂̶̣͉͒̈́̉̈́̕ß̸̆∂̶̣͉͒̈́̉̈́̕ß̸̆. He's just as sick as Error is from his forced job. Bad time helping the one he hates because it just got him in trouble.

    ∂̶̣͉̯̲̳͒̈́̉̈́̕ß̸̆∂̶̣͉̯̲̳͒̈́̉̈́̕ß̸̆ will never go easy on him again.

     
    What will they do now?

    keep reading, to find out -
    Forced... - The rescue
    10/? (so far) ( three of them is not a chapters)
    Recovery <3
    0/?
    =Confession=
    0/?
    Finally free
    0/?

    (FGOD error belongs to harrish6)
    Error: loverofpiggies
    Nightmare and Dream: Jokublog
    Ink: Myebi/Comyet
    Horror: Sour-applestudios-
    Dust: Ask-Dusttale
    Killer: Rahafwabas
    Cross: Jakei
    Blue: Community
    Red: Community
    Classic: toby fox
    (Art by me (Me Paina))
    (Story by me (Me Paina))
    (Undertale by toby fox)

    Series
    Language:
    English
    Words:
    8,398
    Chapters:
    13/?
    Comments:
    36
    Kudos:
    118
    Bookmarks:
    12
    Hits:
    2572
  5. Tags
    Summary

    Go on vacation, they said!
    You need to relax a bit more in a nice place, they have said so politely!
    Visit an exotic place, they said!
    Nothing can go wrong in a ship, they said totally convinced!
    You need to meet someone nice and start a relationship, they said worriedly!
    And you have listened to them over and over again… Why did you listen to them?
    WHY?
    Someone, any kind of deity… could somebody tell you just WHY is this happening to you?

    Why are you lost in what seems like an island lost from the hand of man in the middle of nowhere with weird creatures that seems like monsters that are trying to court you in the most ridiculous ways possible… and why must all of them be fucking skeletons!!!

    And why, oh god WHY do you think they’re HOT beauties out of nowhere?
    Are you really that lonely or is this island somehow messing up with your mind?

    Language:
    English
    Words:
    9,082
    Chapters:
    3/?
    Comments:
    43
    Kudos:
    130
    Bookmarks:
    25
    Hits:
    1209
  6. Tags
    Summary

    This is a story of the Fallen. Individuals who have lost everything, who have given up....and yet- yet they find there is still something more to see. Something more to feel.

    No matter how dark things get, there will always be something waiting on the other side. So long as you have the strength to seek it out.

    Language:
    English
    Words:
    3,978
    Chapters:
    1/?
    Hits:
    2
  7. Tags
    Summary

    Sans has had enough of the stupidity of his Alpha boss. Red, his personal Alpha and mate, has just the plan to cheer him up.

    Series
    Language:
    English
    Words:
    1,002
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    33
    Bookmarks:
    1
    Hits:
    131
  8. Tags
    Summary

    Undertale one-shots that demand I write them. Sans/papyrus x reader centric. I take requests.

    Series
    Language:
    English
    Words:
    20,516
    Chapters:
    52/?
    Comments:
    164
    Kudos:
    334
    Bookmarks:
    36
    Hits:
    8125
  9. Tags
    Summary

    Plot device is convenient, and the Human always causes mischief. Thanks to said mischief, the skeletons are introduced to entirely new world, one that is both adorable and disturbing all at once.

    Bitties may be simliar to other verisons of Bitties but they are not all exactly the same.

    A continuation of Light Drizzles introducing the Bitty Universe, turning out to be so massive it needed it’s own separate story dedicated to it. It is recommended you read Light Drizzles before reading this, but of course you don’t have to. There are some context stuff and events from the first story that are referenced to here.

    Featuring lots of Bitty artwork in most of the chapters!

    Master Name Key at the Bottom!

    Series
    Language:
    English
    Words:
    85,766
    Chapters:
    20/?
    Comments:
    48
    Kudos:
    16
    Bookmarks:
    2
    Hits:
    667
  10. Tags
    Summary

    The first time you met monsters you manage to run into four of them and literally run into one of those four. Now they are apparently moving in next door with their siblings and you can't seem to imagine a life without monsters. On the plus side they tell horrible jokes and have endless amounts of energy. So what could possibly go wrong.

    Language:
    English
    Words:
    253,940
    Chapters:
    64/?
    Comments:
    1786
    Kudos:
    3729
    Bookmarks:
    573
    Hits:
    96108
  11. Tags
    Summary

    Sans and Papyrus were your best friends until randomly they just cut off all contact with you. This went for everyone else in your life so it didn't really hurt that much when they did.

    The only question is why they didn't do it sooner.

    So after two years of loneliness, what was originally a drop off turned into a hospital trip, a broken leg, and your once best friends now homeless.

    What should be happening is them owing you a thanks for rescuing their so called, "Cousins" from a fire.

    Yet here you are offering them a place to stay, at your big ass mansion for the next eight months.

    So now you live with the people who abandoned you, along with their so called "family" who by the way don't really like you because you're a mage, but it's barely relevant to the plot so -

    What could possibly go wrong?

    Language:
    English
    Words:
    32,927
    Chapters:
    4/?
    Comments:
    30
    Kudos:
    186
    Bookmarks:
    53
    Hits:
    1894
  12. Tags
    Summary

    In order to summon a small version of your Soulmate you need few ingredients: Milk, a Love Bloom flower, a small fragment of your soul and a monster to perform the ritual.

    You wanted to feel less lonely in your apartment.

    You did not expect to find yourself with your hands so full.

    Language:
    English
    Words:
    9,217
    Chapters:
    8/?
    Comments:
    262
    Kudos:
    728
    Bookmarks:
    148
    Hits:
    8064
  13. Tags
    Summary

    Stand up comedy by the comics and their content is you

     

    Swapfell:
    In which Papyrus is gossiping about his brother and his brother’s datemate. Which makes you and Sans more popular than Papyrus and the two of you don’t have any idea he was doing stand up comedy that was being aired worldwide.

    Underfell:
    In which Sans loves to show you off and loves to talk about you to strangers. Now you’re wondering who the fuck are these strangers and why are they trying to follow your footsteps as if you’re an influencer.

    Underswap:
    In which Papyrus lowkey brags bff goals between the two of you. Also highkey brags about the relationship goals between you and Sans.

    Undertale
    In which Sans can rely on you with coming up the most stupidest and also the most brilliant ideas. But talking about you eventually makes his own audience gravitate towards your beautiful brain that creates these ideas.

    Fellswap
    In which Papyrus does mischievous things to everyone may it be man or monster. So the both of you team up to torment his brother which is your datemate

    Series
    Language:
    English
    Words:
    12,103
    Chapters:
    39/?
    Comments:
    161
    Kudos:
    415
    Bookmarks:
    60
    Hits:
    7922
  14. Tags
    Summary

    Monsters have been on the surface for a little more than three years now. They have taken over a part of town and very few humans live there. Tensions between humans and monsters are high as monsters fight for their rights and struggle to enter society.

    You, dear reader, are one of the few humans who live in the monster side of town. Your favorite place to grab a bite to eat is Grillby's. The owner is a spitfire of a monster, his violet flames making him rather intimidating. But you managed to get him to accept your presence in his establishment.

    (As the story goes on, I will be adding more tags. Updates will be sporadic. If you want to get notification on updates, follow me on Tumblr! https://horizon-walker-013.tumblr.com)

    Language:
    English
    Words:
    4,018
    Chapters:
    3/?
    Comments:
    3
    Kudos:
    26
    Bookmarks:
    7
    Hits:
    177
  15. Tags
    Summary

    Red, Edge’s brother, had been hiding away in the lab recently, messing with some sort of machine that he didn’t seem eager to tell Edge about. Edge, obviously, didn’t plan on letting this slide. 

    After yet another day of Red blocking himself in, Edge decided that he would put a stop to it.

    By breaking the door down. And nagging him, not letting Red get a word in, as he stepped closer to inspect this machine that Red kept hidden.

    “WHAT EVEN IS THIS, ANYWAYS? WHAT MAKES IT SO IMPORTANT-”

    There was a click, a snap, and a whir.

    And then Edge was gone in a flash of light.

    Series
    Language:
    English
    Words:
    11,533
    Chapters:
    5/?
    Comments:
    21
    Kudos:
    30
    Bookmarks:
    2
    Hits:
    308
  16. Tags
    Summary

    Disoriented and emotionally frayed from decades spent in the void, W.D Gaster suddenly finds himself at the mercy of a cold and arrogant alternate self. His doppelganger promises to return him to the void once his research is complete but before he can make due on his threat, Gaster is introduced to this world’s variant of his son and he is forced to make a quick, spare of the moment decision.

    This sole act sends unforeseen ripples throughout the Multiverse and hurdles Gaster on a perilous journey across it to find his way home.

    or

    Dadster plays hopscotch across the multiverse, unintentionally and intentionally acquires children, tentatively reciprocates Grillby's feelings, engages in actual literal custody battles with copies of himself, somehow steals a Bad Sans™, narrowly avoids death at the hands of Error and somehow flies under Ink’s radar for a shocking amount of time.

    Language:
    English
    Words:
    5,686
    Chapters:
    1/?
    Comments:
    12
    Kudos:
    20
    Bookmarks:
    3
    Hits:
    85
  17. Tags
    Summary

    You're an afab trans non-binary man, who pays the bills by being a faceless "accountant" online.

    one day, you're supposed to meet friends for dinner and bump into a skeleton. little did you know the chaos that would unfold just by greeting one!

    well...at least you can say your biggest fans are definitely big...*wink*

     

    reader is a afro-latino non-binary trans man.

    Language:
    English
    Words:
    587
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    15
    Bookmarks:
    3
    Hits:
    154
  18. Tags
    Summary

    Congratulations!!

    You're one of the 'Lucky' few to get your hands on a copy of Broken Souls! It's a once in a lifetime opportunity to play with our 'Immersive' technology!!

    Create a Unique character! Meet Interesting Characters! Fall in Love! Unlock Secretes, and Much, Much More!

    Warning!!

    We are not Liable for any harmed caused! Have fun, stay safe, but most importantly!

    Don't. Die.

    Language:
    English
    Words:
    113,441
    Chapters:
    23/?
    Comments:
    629
    Kudos:
    514
    Bookmarks:
    110
    Hits:
    11900
  19. Tags
    Summary

    Macha just wanted to get a hoodie before she moved out. That's all she wanted. She didn't want to die and be sent to a universe where some of her favorite characters hated her. At least some of them weren't quick to join the hate train.

    Language:
    English
    Words:
    3,909
    Chapters:
    2/?
    Comments:
    16
    Kudos:
    60
    Bookmarks:
    19
    Hits:
    412
  20. Tags
    Summary

    Vera was once an avid believer in magic till one day she was pushed to believe things like magic, monsters, and mages didn't really exist. On the day she realizes its all actually real in her world she decides to try something unpredictable that unknowingly would change her entire life.

    After losing her memory due to a pact/curse she finds herself in the 'care' of the Star Sanses who mistake her as Nightmare by accident. Will she be able to break this curse without losing those she cares about? Who else will come after her demanding answers? Or will the darkness consume her...?

    (Inspired by my story 'The Poison Apples in the Garden' I wanted dream to have someone to. <3)

    Language:
    English
    Words:
    11,032
    Chapters:
    7/?
    Comments:
    36
    Kudos:
    41
    Bookmarks:
    8
    Hits:
    517

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