Gasterxreader Stories

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 th...

Suddenly you find yourself in the Underground, with no memories and an unknown and painful past. Your first encounter is Flowey and he tells you how weird and different...

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 ta...

Your a neko: (deal with it) your 'Master' has thrown you into a pond that had a waterfall going to the underground. After falling 1000ft down, you landed on a soft yello...

"What's that look for? Are you perhaps unhappy to see me?" "Oh no. Oh no, quite the contrary, my love. I've craved to be with you for the longest time&quo...

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 i...

"Do you not want to go back home? To the surface?" °°°°°°°°°°°°°°°° "No." °°°°°°°°°°°°°°°° "Why?" °°°°°°°°°°°°°°°° "Because my home i...

You've always have had a creepy smile, and it doesn't help that you have these scars on your face now.... It doesn't matter though, you're fine with it, and he's happy t...

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 actual...

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...

Handplates: GASTER x Subject! Child! Reader! Make sure you know this is a Female Reader! The Full Cover is in my Art Book! Also. NO SEXUAL SHIT. This is Supposed to be a...

Reader meets WD Gaster. Takes place before the monsters are freed from Underground. Enjoy.

AU X Reader AU x AU Normal stories. Youknow, stuff.

(Cover art by Tumblr user rorischach) Tw for mentions of medical settings and tools, as well as possible death and light gore. Nonbinary Gaster (he/they), I will die on...

still need a proper thumbnail "do you think this will work?" he questioned, concern coating his face as he stared into your eyes. "I don't think, I know...

Author's note: Brrrr this is my first ever fanfic I've ever made sksksk and for the first time, the reason for this is bc I got an idea for Gaster X reader fanfic! I gue...

The remastered version of my highest read (and only visible) story! A story of a young woman in her early twenties living in the small town of Cameron Mines, residing j...

The True Gaster x Female Fanfiction

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

your name is Y/N and you got transferred into a void filled with tall skeletons and you are very confused...but...not afraid