gaster

Undertale x reader ~requests open~ by Chaos-Prince
Undertale x reader ~requests open~ by Chaos-Prince Fanfiction
I've decided to just make this an Undertale/Undertale AU x reader just to make this easier(?) for me. will be adding my AUs as well, since I have a few ideas in mind. I'...
Gaster gang x reader oneshots by Chaos-Prince
Gaster gang x reader oneshots by Chaos-Prince Fanfiction
cover art belongs to Bunnymuse on deviantart/Tumblr! okay so I've decided to finally get around to writing oneshots with the Gaster gang! also I shall be adding a few of...
Undertale Comics 1 by crazytitan25
Undertale Comics 1 by crazytitan25 Random
Just a bunch of comics about Undertale.I do not own this comics.
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
(Sans x Reader) When Two Souls Meet by Zana B Sparrows Fanfiction
Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over a...
Gaster One Shots 3 by BrownENH
Gaster One Shots 3 by Emily Skelewolf Fanfiction
THIRD TIME IS THE CHARM! [Highest ranking #98 in fanfic] NO IMAGES R MINE
Undertale Daughter Scenarios by FrenchPokingOtaku
Undertale Daughter Scenarios by ♡StillPoking♡ Fanfiction
I was bored oh well but this is a scenario book so be warned this is my first and probably not my last so let us start and by the way your gonna start out as a baby to m...
Gaster AU Oneshots 2 by BrownENH
Gaster AU Oneshots 2 by Emily Skelewolf Fanfiction
Here we go! All images shown are not mine. Cover is by Bunnymuse. Highest Rank: 48 in Fan fiction
Gaster AU x Reader ONESHOTS by BrownENH
Gaster AU x Reader ONESHOTS by Emily Skelewolf Fanfiction
Let's get this over with... HIGHEST RANKING: #35 in Fanfiction June, 23, 2017 ALL IMAGES USED ARE NOT MINE! Cover was made by Bunnymuse on her Tumbler (I think). Bunnym...
Obsession [GasterSans x Frisk] by Ink_Gamer
Obsession [GasterSans x Frisk] by ~Im_Yours~ Fanfiction
On the 18th birthday of the princess, she was once again be able to go outside. But in that special day of her's was the time she's going to meet a whole, new, cruel wor...
Undertale Shorts by ANinnyMouse42
Undertale Shorts by ANinnyMouse42 Fanfiction
A bunch of Undertale short stories! ... Which, despite the cover, are not only about Frisk, Flowey, Alphys, and Sans. There are other characters in there too. Aww, who'm...
Gaster x Reader by MoonReader109
Gaster x Reader by MoonReader109 Fanfiction
Pretty self explanatory. This takes place after the Pacifist route in Undertale. Through determination, Frisk was able to bring back Chara, Asriel (Asriel is Flowey per...
My Greatest Experiment (Skelebros' Origin Story) ON HIATUS by ZanaBSparrows
My Greatest Experiment (Skelebros'... by Zana B Sparrows Fanfiction
After much research and theorizing, I've decided that I'm going to attempt it. It's risky, but I'm so desperate at this point that I'm willing to put my own well being o...
De-Termination: Chara X male reader by Xuatiel
De-Termination: Chara X male reader by Xuatiel Fanfiction
Sometimes timelines can have anomalies albeit a very low chance but it is possible . The anomalies can do many things. Such as allow certain things to be changed. In thi...
Little Lyrebird(G!Sans x Reader) by Undertale20XX
Little Lyrebird(G!Sans x Reader) by Undertale20XX Fanfiction
He created me to become the people's art. But he has only created the perfect weapon.
The worst way (gaster Sans X reader) by SkeleFelly
The worst way (gaster Sans X reade... by SkeleFelly Fanfiction
Normal days. In your huge...lonely....stupid house that was given to you by your mother and father. They gave you everything. But not out of love. Just to get you out of...
Broken Souls by UndertaleSinner
Broken Souls by Proud SkeleSinner Fanfiction
Set in the HorrorTale AU. When a broken human girl finds herself trapped in a world of bloodthirsty, ravenous Monsters, will she get away with her life? Or will she be j...
Undertale Sin Buk by PuPPeT__mAsTeR
I like New, I like You GSansXReader (Finished) by EternalKimFlame
I like New, I like You GSansXReade... by GalaxyChild Fanfiction
You finished the game, everything is peaceful, and Frisk is happy...but what about the scientist no one remembers? This Book is Finished.
Afterdeath Oneshots by speedy1123
Afterdeath Oneshots by SapphireRing Fanfiction
This is a book of Afterdeath oneshots. Feel free to leave requests!
Just A Touch {Gaster!Sans x Reader} by Fruityyloopz
Just A Touch {Gaster!Sans x Reader} by Momo Fanfiction
After the monsters raised from Mt. Ebbot they quickly declared peace. They coexist and lived with humans, for a single moment everything was perfect... but then that mom...