Undertale (Video Game)
Gasterfan fiction
Character · 9,412 works
Gaster turns up in 279 works open to everyone here. The average one runs about 21,900 words. Read any of them in your browser, save it as an EPUB, or listen to it.
Works
Some results are potentially explicit
Undertale (Video Game)+1
Falling
by orphan_account
Falling. Falling. Falling.... A sharp tune whittles at his ear. Why, why won't it stop? Burbling laughter.... It's his own. Nothing is right in this world. In this world, realities combine.
Undertale (Video Game)
In the Language of Flowers
by TaintedCure
You had long forgotten what you used to be like before the war. Who you were before Sans.You had resigned yourself to dying like the rest of the rotting corpses on the battlefield, the glorified title of the "Judge" nothing more than another meaningless name to be forgotten like the rest. Everyone you cared about was dead and gone, and Papyrus no longer looked you in the eye anymore. You were ready for it all to end in a blaze of glory.You hadn't anticipated you and your brother to be caught in the crossfires of a malfunctioning machine, bringing you to an alternate, peaceful universe with other versions of yourselves.[SPORADIC UPDATES]
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
Microwave Grapes
by Beabaseball (beabaseball)
Gaster's not even really interested in CS-1 or project PERSEVERANCE, he's just working on it because the current Royal Scientist told him to, and the king told the Royal Scientist to look into the option in the first place, so, hey, there's really not many ways he can argue his way out of this one. He'll just wait for the experiment to fall flat on its face so he can get back to the projects he actually wants to work on.(CS-1 wasn't supposed to have a mind, and Gaster was not supposed to care about him.)((Will be updated with ending summary and askblog pics for archival))
Undertale (Video Game)
Seethrough
by Cuddlebearable
You're dead, you've been so for a while. Satisfied with your ghastly status and non-existent familiar relations you just want to continue as you've always done. But as a new buyer is about to move in, it seems you're unable to do so, considering that they all find you rather fascinating. Skeletons, who'd have thought.
Underfell - Fandom+2
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
Blue
by kaliawai512
Gaster had the means to repair one of his greatest mistakes, but he never had the chance.Until he does. Now it's just a matter of whether he has the will to, and whether the one he has so horribly wronged is willing to let him try.Based on the "mercyplates" AU of Zarla's "Handplates." Sequel to "Bandages."
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
Gaster's Home for Wayward Skeletons
by Rivethart
It worked.He could travel to other universes now, find one where Monsters had broken the barrier, free his people, show his sons the stars.Well, if he didn't get sidetracked by the angry copy of himself and the two damaged boys watching him with broken eyes.
Undertale (Video Game)
Friends
by raspberrysplash
GASTER sees seven souls come to him. In one of them, he finds a friend.
Undertale (Video Game)
A potentially explicit work
Undertale (Video Game)
Inkspots
by Cuddlebearable
One after another, you find yourself situated with a bunch of small, cute and severely intelligent blobs. What has your life come to?