1 - 20 of 49 Works in Gaster Papyrus (Undertale)

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  1. Tags
    Summary

    The Serif household has been through many odd scenarios. After all, they are entirely comprised of other versions of the same two skeletons who got stuck in the world they have called home for six years, unable to return to their worlds and thus forced to carve out a life for themselves until further notice. All things considered, they found their stride and adapted to the ongoing weirdness of universe hopping.

    That is, until she arrived. Flora, a woman so out of left field and disrupting their normality, appeared in the basement, battered and bloodied to hell and back. Stuck like all the others who had appeared before her, the Serif household is forced to accommodate her until she stabilizes, slowly beginning to get to know the lackluster and stone-faced woman who ensures they don't injure themselves via stupid means.

    Few expect her to open up. Fewer expect her to accept becoming friends.

    None expect for any of them to become much, much more.

    Language:
    English
    Words:
    215,586
    Chapters:
    21/?
    Comments:
    71
    Kudos:
    186
    Bookmarks:
    62
    Hits:
    6,517
  2. Tags
    Summary

    You are a college student that just want to get yourself together, get a degree and make money enough to live alone in a cozy flat. But what should you do when you struggel with studies and different jobs while sharing a life with skeletons whom seem to don't like you?
    Determination won't be enough to keep living in this hell. And a friend of yours make sure you remember that everyday.

    Now the breaking news:
    - I love comments
    - No beta reader
    - English is not my mother language
    - Long time until next update
    - I am as bad as Asgore to name and nickname the characters

    Language:
    English
    Words:
    57,120
    Chapters:
    21/?
    Comments:
    869
    Kudos:
    1,510
    Bookmarks:
    297
    Hits:
    46,398
  3. Tags
    Summary

    What happens when everything changes? Everything is the same but it isn't.

    An entity from the stars descends to earth and disguised themselves as human. They witness history in this new era of monsters and humans, while also dealing with the demons that dare dirty the earth with their presence.

    What happens when you step into the battleground from one universe, only to win and come out into another parallel world, except you’re the protagonist?

    You weren’t one for the spotlight. You loved your sister, even if she wasn’t one by blood. You only wished for her well-being and happiness. Except here… she’s gone. And now you have to take her place and stand under the limelight as you walked your path in her place - the protagonist.

    ————

    I DON’T CONDONE MY WORKS TO BE TRANSLATED, REPOSTED AND/OR FED TO AI.

    9/1/25 — thank you for 600+ hits!

    Series
    Language:
    English
    Words:
    21,663
    Chapters:
    5/?
    Comments:
    6
    Kudos:
    35
    Bookmarks:
    13
    Hits:
    1,069
  4. Tags
    Summary

    When you decided to come to Ebott, it had been a desperate attempt to bring peace into your life. These last few weeks have been anything, but peaceful. Yet you wouldn't change a single day. Meeting them has made you feel more alive than you have been in years.

    A softness, a fullness, and brightness that makes your soul swell.

    Language:
    English
    Words:
    16,774
    Chapters:
    6/?
    Comments:
    17
    Kudos:
    101
    Bookmarks:
    31
    Hits:
    1,591
  5. Tags
    Summary

    I think we get the gist right ? Innocent girl,guy,them stuck with skeletons who hate them because of they're precious girlfriend,. Except there's a twist ! Your blind and your married to one of the most viscous sanses in the multiverse nightmare with his crew who care for you deeply as family and let's just when shit hits the fan it's going to be beautiful.

    Language:
    English
    Words:
    12,646
    Chapters:
    3/?
    Comments:
    7
    Kudos:
    38
    Bookmarks:
    10
    Hits:
    1,187
  6. Tags
    Summary

    You finally have found a reef that has been untouched by sirens, so you bought what you thought was a house on the island next to the reef. When you get to the island, you find that everything is not what it seems and the mysterious call that you have all of your life is acting up in your new location.

    Language:
    English
    Words:
    13,576
    Chapters:
    5/?
    Comments:
    28
    Kudos:
    189
    Bookmarks:
    56
    Hits:
    5,641
  7. Tags
    Summary

    Relationships; matter who it involves man with woman, woman with woman, man with man. A pansexual poly relationship, their ALL just so messy and unnecessary. Who has time to be with a partner (or partners) when the world has video games and mangas. Don’t you just rather read about romance instead of trying master it (especially spicy BL’s with all the saucy pics)

     

    Well do ya?

     

    It’s not like it matters much anyways, since in this story you’re a young adult that lives a rich life of solitude. You live in a small manner on a lonely street, across from you is a large mansion that has been abandoned for decades. It’s so god damn expensive no one in their right mind could afford it, another reason you bought it so you could live a life of solitude. But one day overnight a moving truck full of skeleton’s changed that, with a neighbors of excitable, edgy, witty, slightly annoying and friendly skeletons living next door.

     

    Life has truly changed…

    Language:
    English
    Words:
    2,297
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    8
    Bookmarks:
    1
    Hits:
    101
  8. Tags
    Summary

    Sticks and stones are worse than words and you have the text message to prove it. Now your soul is literally broken and your very name has been seemingly erased from the collective vocabulary of the universe. At least there is an adorable skeleton child to distract you from taking care of yourself.

    Series
    Language:
    English
    Words:
    30,064
    Chapters:
    7/?
    Comments:
    3
    Kudos:
    37
    Bookmarks:
    9
    Hits:
    676
  9. Tags
    Summary

    Castellar ends in the main universe after sans fucks for the 100th time and doesn't bother to realize she has been living in the woods behind his house for three months. She is only found when the horror tale brother happen upon her. Romance ensues.

    Sue me.

    Language:
    English
    Words:
    1,680
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    11
    Hits:
    74
  10. Tags
    Summary

    You, y/n, are a cat. You meet the Skeleton after an accident, and he looks like he's trapped. You're not sure, but will you become friends with him and turn things around for him?
    But wait,why there are so many bones in here?

    Language:
    English
    Words:
    14,149
    Chapters:
    7/?
    Comments:
    29
    Kudos:
    130
    Bookmarks:
    21
    Hits:
    1,860
  11. Tags
    Summary

    A disorganized series of drabbles for skeleton-lovers, almost definitely bound to be cavity-central.

    -

    Now updated with links to AU descriptions for uncommon AUs!

    Language:
    English
    Words:
    24,627
    Chapters:
    38/100
    Comments:
    589
    Kudos:
    1,863
    Bookmarks:
    225
    Hits:
    37,623
  12. Tags
    Summary

    Act 1 (Chapter 1-25):
    Papyrus is dead. Frisk can't reset. Sans was losing his mind. His only solution was to pull through alternate versions of him until he finds him again.
    Unfortunately, you're the one in charge of babysitting your best friend and his dead brother's alternate versions.

    Act 2 (Chapter 26-?):
    Friendship and romance was the last thing on your mind. But the longer you spend time with the skeletons, the deeper you get entangled in their lives.

    Series
    Language:
    English
    Words:
    275,794
    Chapters:
    40/?
    Comments:
    1,059
    Kudos:
    2,364
    Bookmarks:
    511
    Hits:
    92,991
  13. Tags
    Summary

    On your way home from work you are suddenly pulled into an alternate universe that you thought was fictional. Armed with (hopefully correct) knowledge of the Undertale multiverse you gathered as a teen, you take your situation into your own hands. You have to find a way home. You have a life, a family and a loving boyfriend! You have to go back, no matter what.

    (Better summary coming soon)

    Language:
    English
    Words:
    13,697
    Chapters:
    2/?
    Comments:
    28
    Kudos:
    135
    Bookmarks:
    32
    Hits:
    1,833
  14. Tags
    Summary

    As one would believe, life is hard. Sometimes it's even harder if you're different, for whatever reason. And life became much, much harder when monsters came to the surface; for both humans and monsters. But despite it's hardships, there is always something to look forward too, even when looking might be the last thing on your mind.

    (In this story, the reader is in an abusive and neglectful household (for a bit anyways), and becomes (family?) friends with the skele-bros later on.)

    **This story is STRICKTLY platonic as the reader is portrayed as a teenager (I don't/won't do/write any underage/age gap romantic relationships)
    **The reader is nonbinary and uses they/them pronouns as I would like to make this story accessible for everyone :)
    **The reader will be called/have the nickname "Runt" bc it is a reference to the title and to the familial-type relationships that I will be portraying in this story as well

    (The story title is also based off of a song by My Chemical Romance, and the chapter titles will be songs or lyrics as well :) )

    Language:
    English
    Words:
    2,336
    Chapters:
    2/?
    Comments:
    13
    Kudos:
    70
    Bookmarks:
    12
    Hits:
    875
  15. Tags
    Summary

    Undertale Epilogue.

    Language:
    English
    Words:
    3,807
    Chapters:
    4/?
    Comments:
    2
    Kudos:
    18
    Bookmarks:
    4
    Hits:
    412
  16. Tags
    Summary

    An unpredicted magma flare catches Gaster and his brother Sans during maintenance on the CORE.

    Series
    Language:
    English
    Words:
    768
    Chapters:
    1/1
    Comments:
    8
    Kudos:
    94
    Bookmarks:
    10
    Hits:
    667
  17. Tags
    Summary

    Thirty-three years you spent filling the lonely void in your chest with fairytales and fantasies of a normal life.
    Twenty-three years you spent raising your siblings into weapons just as Mother raised you. Many nights you held them as they cried their guilt into your shirt, promising you’d bear the weight of their sins for them.
    Ten years you spent completely and utterly alone with nothing but your books and Mother’s cruelty.

    You didn’t know who you were. You knew who you loved and what you’d done. You knew what you were capable of and you knew what you wanted.

    When Mother told you that you had a guest to entertain, you felt sick. There was no leaving this place, all you could do is make their stay as comfortable as possible.

    Perhaps, if you did a good enough job, they’d like to be your friend.

    EDIT: Gonna do some editing of this. It was super rushed and there are a few parts that definitely need to be reworked.

    Language:
    English
    Words:
    16,000
    Chapters:
    7/?
    Comments:
    37
    Kudos:
    254
    Bookmarks:
    70
    Hits:
    3,950
  18. Tags
    Summary

    I cannot stop this sickness taking over/It takes control and drags me into nowhere
    I need your help, I can't fight this forever/I know you're watching; I can feel you out there
    Take me high and I'll sing/You make everything okay
    We are one and the same/You take all of the pain away
    Save me if I become my demons
    Human flesh was once the staple of the monster diet, but now that other food sources are available and science has determined there are better long-term benefits to a diet not saturated in human blood, monsters have begun rehabilitation. Now, human blood is a distant temptation, a secretly coveted drug that leads to ruin. Humans have integrated into monster society, have even found mates in monsters.
    Strings, an amnesiac skeleton monster, made the mistake of choosing the wrong one.

    Series
    Language:
    English
    Words:
    30,730
    Chapters:
    8/8
    Comments:
    82
    Kudos:
    79
    Bookmarks:
    15
    Hits:
    3,254
  19. Tags
    Summary

    Somewhere in this wretched hell there are souls desperately fighting the fiery tide magic and chaos that controls this hell. Determination alone might not be enough to egress from the island. They'll have to fight not only the chaotic hell of the island itself but the primal savagery that has taken over each and every one of them.

    Language:
    English
    Words:
    7,442
    Chapters:
    4/?
    Comments:
    4
    Kudos:
    24
    Bookmarks:
    5
    Hits:
    724
  20. Tags
    Summary

    All I wanted was to get my nightly MonStar energy drinks, some Jerky and head home to my cats after a shit day working for a scumbag Monster-phobic asshole. Now Ex- Boss.

    Its been a few years since Monsters came out, and of course humans had to make it hard for them like every other minority on this planet. So It doesn't surprise me when 3 idiots I booted from the club came down the street to target some Skelly in the convince store at 3 in the Damn morning.

    Shit he's pretty cute too....aww fuck it.

    Better grab Baskerville cause it looks like ill be giving someone a Bad Time.

    Series
    Language:
    English
    Words:
    56,308
    Chapters:
    30/?
    Comments:
    414
    Kudos:
    443
    Bookmarks:
    98
    Hits:
    9,924

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