Gaster Stories

The reader wakes up to a new life as a monster skeleton. In a new world, that's filled with monsters, humans, and magic. But instead of living their new life to the full...

DISCONTINUED !! you've been alone since a young age. your life was never the best. it was actually pretty stressful. when you turned sixteen, you decided to stay in one...

What if Sans only got Papyrus away from Gaster? What would happen if Alphys found him trapped years later? Can they teach him to be a normal monster, or will he forever...

He was deserted. Abandoned. Neglected. Disowned. Forlorned. She was compassionate. Affectionate. Solicitous. Warmhearted. Fonding. He was empty. She was fulfilling. She...

(YN), an 18 year old teenager that lives in a dimension called Undertale, alongside with his parents; Queen Toriel and King Asgore. His parents were then worried about h...

Gaster, the Royal Scientist created best of his invention. Core of Hotland. But there was an accident that ended his life. As a result of the crash at launch, he fell di...

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...

"Like Underfell, but a different AU."

The adoptive brother of Ruby and Yang attends Beacon Academy

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

Y/N had been around for only 16 years, though considering that he's been around for longer with that damn Flower and the RESETs, probably longer. Well, anyway, Y/N had a...

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...

DRAMA, ACTION, BLOODSHED... Love? After erasing hundreds and hundreds of timelines, Chara is suddenly stripped of her abilities. She's forced to lead an everyday life i...

Error didn't know what to expect after being pushed into the Void. He didn't expect to be transformed into a teenager. He didn't expect to fall into a world full of drag...

A/n: I got some inspiration from another story, I'll try not to make it a carbon copy. Gremory Rose, to be exact. The forgotten child. The Cursed One. Such cruel names t...

You are a new servant for the King of Spades in his castle, your job is simple yet boring, you have always found curious that one '???' level in the elevator, one day Ro...

Just a bunch of comics about Undertale.I do not own this comics.

Yes there will be mistakes >:3

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...

WARNING: STORY HAS VIOLENCE (Y/N) is a young 17 year old who goes to Underhigh, the biggest high in the multiverse. (Y/N) had no friends and a bad past. She's smart thou...