Select All
  • I Wouldn't Mind | Gaster x Reader
    906 23 3

    [Y/N] [L/N] is a 23-year old girl who lost her parents because of the Human and the Monsters war at the age of 13. She was left with her abusive auntie, Getting beaten up, kicked, punched, being treated like a slave everyday.Because of that she forgot how its like to be loved or to love. Until One day, She gave up and...

    Mature
  • Darkness' Eternal Bride (Gaster x Reader)
    27.6K 1K 34

    WARNING: THIS CONTAINS HIGHLY MATURE CONTENT (BLOOD, VIOLENCE) READ AT YOUR OWN RISK Money can change a lot of things. It can even change your destiny. Plunge yourself into a life of romance, science, disappearance and misunderstanding. ________________ "When you get better, I'd like to kiss you" ... Gaster only wante...

    Completed  
  • Dark, Darker Yet Darker AU (W.D Gaster Romance)
    1.6K 50 3

    Watching your determination being extracted from your soul. Fills you with fear.

  • Doctor Darkness {Gaster x Kind!Reader}
    305 5 1

    It's been a few years since monsters had poured out from Mount Ebott unexpectedly. You were always a kind soul, so you had very little problem adapting to the newcomers. Even if some monsters were bitter toward humanity, you always tried your best to befriend them and show them the kindness that your ancestors had not...

  • Fear Me- Handplates!Gaster x Reader
    50.2K 904 14

    WARNING!!! This story WILL contain rape/noncon and gore, inhumane treatment of the reader, and NO ROMANCE until possibly very late in the book. I plan to update frequently but that may not happen. This is being written as a guilty pleasure type thing to make me feel a little better about some of my messed up fantasie...

    Mature
  • Subject 108 (Gaster x Reader)
    37.5K 1.5K 59

    Under editing Every-night you dreamt of a strange man, the strange Dr W.D Gaster who you fell madly in love with. With each passing day you grew closer and closer, but everyone has secrets... Even the seemingly perfect Dr Gaster. (WARNING GORE, SWEARING AND LEMONS) Cover art by @Redwolf878

    Mature
  • The Ghost Above Me (Gaster x Reader)
    45.8K 1.7K 33

    Even though the Underground is now empty, except for some people, you still stupidly managed to fall in the once prison for monsters. Who knew you would get away from the prison with someone following you behind your back? Who would have known an echo flower would have revealed too many things? Who would have known yo...

    Completed  
  • Artificial Love Of A Skeleton (Gaster x Reader) ARTBOOK
    161K 8.3K 81

    Yes, the whole thing is made with arts. not words. I'm lazy to type. Btw this is Undertale and the aus of undertale + my oc and people's oc. If you do not know Undertale: It is a game developed by Tobyfox and his crew, cost about $10. Do support him by buying it. With cracks, you might have a hard time to find Gaste...

    Mature
  • The Faults in Our Souls ~ Gaster x Reader (Under editing)
    43.4K 1.5K 28

    "Do you not want to go back home? To the surface?" °°°°°°°°°°°°°°°° "No." °°°°°°°°°°°°°°°° "Why?" °°°°°°°°°°°°°°°° "Because my home is right here, sitting next to me." _______________________ You were used to the unfortunates of life. Everyone had them, it was normal, but life decided to take a lemon, freeze it, the...

    Completed  
  • The War Amongst Us (W.D. Gaster X Reader)
    64.7K 3K 24

    (Y\N) is a young female spy and soldier fighting in the War of Humans and Monsters. She is fighting on the humans' side of the war until a turn of events when she becomes apprehended by the enemy. What will happen when a young monster scientist tries to change her views? Thanks to Itachei on Deviantart for letting me...

  • Gaster x Reader (Probably will be a Lemon)
    36.5K 815 8

    So I was really inspired to keep writing stories by someone who commented on one of my stories. You know who you are. I've been on here a lot and I've seen people actually reading my books... I'm so happy ^_^ Anyway... A backstory and How to read an X reader will be the first chapter... This'll probably end up being a...

  • Prisoner of War (W.D. Gaster X Reader)
    46.6K 1.7K 14

    You are one of the few humans with magic during a war between you and the monsters. (Pre Undertale) Instead of killed you wind up captured by the monsters where you meet a scientist and doctor W.D. Gaster. Cover... I drew it myself this time

  • W.D. Gaster X Neko Reader
    4.2K 84 7

    W.D. Gaster studies love. He studies his test subjects then kills them. But here's the question. Will he kill you? Or will you forever be in his heart?

    Completed   Mature
  • Fallen Angel (Gaster x reader) OLD
    148K 6K 49

    OLD AND BADLY WRITTEN THE REWRITE IS POSTED ALREADY DISCLAIMER: The god figure created in this fanfic is purely fictional. He is purposefully made to be prideful and cruel and is not supposed to represent any god. I am religious myself and I did not intend to attack anyones believes with this book. An angel. Sign of...

    Completed  
  • W.D Gaster X Reader
    2.5K 35 7

    this is my first time so hope you all can enjoy

  • The void in my heart (Gaster X Reader)
    29.6K 813 22

    You're a human girl, living on the surface with Frisk, who is your younger sibling. You one day find two children, who's been chased away from neighborhood to neighborhood. And with you're kind soul, you couldn't leave them to live in the streets. You take them in, and meet their father. But will one day, lose them, b...

    Completed  
  • Glitched Love - W. D. Gaster x Reader
    57.5K 1.6K 31

    You, a human, have fallen down into the underground. After having exploring most of it, you have successfully made lots of friends and killed no one. While you want to go back home to your town above ground, all your friends that you had made you decided to stay, or for the moment at least. Very soon, you will end up...

    Completed   Mature