Subject 108 (Gaster x Reader)
_Bobundercover__
  • Reads 37,578
  • Votes 1,523
  • Parts 46
  • Time 3h 32m
  • Reads 37,578
  • Votes 1,523
  • Parts 46
  • Time 3h 32m
_Bobundercover__
Ongoing, First published Apr 03, 2017
Mature
darkexperimentfanfictiongastergasterxreaderhappyfamilylemonlovelustpapyrusprisonromanceromancefanfictionsanstrueloveundertaleundertaleauundynewdgasterxreader
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
All Rights Reserved
darkexperimentfanfictiongastergasterxreaderhappyfamilylemonlovelustpapyrusprisonromanceromancefanfictionsanstrueloveundertaleundertaleauundynewdgasterxreader
Table of contents

46 parts

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Darkness' Eternal Bride (Gaster x Reader) by xsfolia
34 parts Complete
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 wanted to conduct an experiment. He surely didn't want his life to be taken over by weird feelings. He also wanted the only thing he couldn't really have. He wanted you. What will he obtain? Will his research finally be completed? Or will he have to start another one? As for you, will you be able to move on from the past? Words count: 81.390 Also contains mentions of nsfw [Rankings: #1 in #gaster (08/21/2022), #5 in #xreader (08/21/2022)]
the Undertale Adventures by Nanmaku113
33 parts Complete Mature
What, if you meet Sans and get a crush on him? You two would move into the underground and experience some funny adventures together! Get ready for: The Undertale Adventures ~Pibs
Universal Surface Angel by Lithriel
18 parts Complete
Reader insert. What if W.D Gaster didn't just get split between time and space, but actually ended up in your world in an abandoned hospital you called home? Your were a young child he decided to use as experiments to test human determination in said world and breaks physical laws to test human possibility? He knows of the powers you gained from his experiments... all but one, this one allows you to tear realities just enough to teleport into them. Knowing of Undertale you felt bad for the monsters stuck below in their world and wish to help them, but something goes wrong and you end up going to certain AUs and helping them, gaining the attention of some bad skeletons who now desire your power for them-selfish-selfs.
Should we be together? (Gaster x Alice OC) by Inugami_sama
12 parts Complete Mature
have a dream about Gaster and my OC. It's would be a short story. ______________________ Long ago, there was two species that rule the world. Monsters and humans. One day, the war broke of between them. The war last for century. When the humans thought of winning the war, a unexpect twist would change both the respective species. I DO NOT OWN UNDERTALE AND HIS CHARACTER!! ONLY MY OC IS MINE!
A Perfect World by SpiritWolfNura
12 parts Complete
Image a world where there was no war. Toriel and Asgore never divorced. Gaster never fell into the void. The genocides never happened. Everyone is happy. That is this world. Gaster is a top scientist in the human government, helping improve the world. Alphys and Sans are his assistants. Asgore, mayor of Ebott and Toriel a teacher. Frisk, Chara, and Asriel their beloved, not dead or murderous kids. Undyne is the chief of police and Papyrus is her lieutenant. Everything is perfect..
We Speak In Hands (Gaster x Female!Reader) by OreoDaSkeleton
33 parts Complete
Gaster is the current royal scientist, set with a mission to break the barrier and free monster-kind from their underground prison. His loyalty and persistence to the task is clear, since he'll make whatever sacrifice necessary to complete it. However, even a perfectionist can be blind to some of their own flaws. Gaster has a habit of pushing things or himself too far. An accident occurs in the lab. Whilst trying to save him; one of his lab assistants, Y/N, gets injured. Burdening himself with even more pressure and guilt to fix it, Gaster thinks that doing all of her work for her will cover up the incident. Still, the sad reality is that the damage can't be undone. Well, Gaster ends up spending more and more time with her. As a result, both of them gain an entirely new perspective of the other, they aren't just another monster in a lab coat anymore. Hey! It's Oreo aka Writer~San! Undertale, it's characters, and it's fanart do not belong to me. However, the story does!!! I hope you enjoy it! (^w^)~
Origin Of The Bros (Fontcest) by BubblyShip
8 parts Complete
(Toby Fox owns UnderTale, the cover is my own art, and I'm trying out unusual ships and Fontcest is the next in line following Sansdyne. Why not?) Papyrus used to have trouble making friends, so his Dad decided to new addition to the family would be a great way to make Papyrus a perfect brother! Or, if things spiral out of control, a perfect boyfriend. Gaster really should have considered making Sans' personality not fit so perfectly with Papyrus' before he created him.
The Time Before (Undertale) by ANinnyMouse42
59 parts Complete
~o0o~ Book 1 of the "Better Times" trilogy ~o0o~ (Book two: "A Name to Remember") (Book three: "No One is Happy with This") There was a time where a Royal Scientist got an idea. A time where he created two weapons, who turned out to be people. A time where he built a machine to power the Underground. There was a time when the timelines weren't messed up by a certain flower, and then a certain child. There was a time before. ~o0o~ Wattpad Featured Story on 4/28/17 - on the OLD featured list ~o0o~
W. D. Gaster x Reader by _MTTBrand_
41 parts Complete Mature
A collection of one shots between you and the man who speaks in hands. Some will be long, some will be short, some will be happy, some will be angsty, some will be fluffy, some will be smutty. I will write for certain AU's, but don't be offended if I ask for an explanation of the AU you request, I don't know them all. I take requests.
Papyrus x Reader- Oneshot Booklet 💕 by l0s3r95
23 parts Complete Mature
(Cover art by @pumpkinbday!!!) Just a bunch of Papyrus x Readers! Requests are closed. Thanks for everything :)
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Slide 1 of 10
Darkness' Eternal Bride (Gaster x Reader) cover
the Undertale Adventures cover
Universal Surface Angel cover
Should we be together? (Gaster x Alice OC) cover
A Perfect World cover
We Speak In Hands (Gaster x Female!Reader) cover
Origin Of The Bros (Fontcest) cover
The Time Before (Undertale) cover
W. D. Gaster x Reader cover
Papyrus x Reader- Oneshot Booklet 💕 cover

Darkness' Eternal Bride (Gaster x Reader)

34 parts Complete

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 wanted to conduct an experiment. He surely didn't want his life to be taken over by weird feelings. He also wanted the only thing he couldn't really have. He wanted you. What will he obtain? Will his research finally be completed? Or will he have to start another one? As for you, will you be able to move on from the past? Words count: 81.390 Also contains mentions of nsfw [Rankings: #1 in #gaster (08/21/2022), #5 in #xreader (08/21/2022)]

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