Gasterblaster Stories

Sans and Papyrus' dad is the one and only Dr. WD Gaster. There mom is.. a werewolf?

YN Sans grew up wanting to be a hero. With the help of his best friends Frisk and Izuku, he aims to go to UA and accomplish that goal. Sans Male OC x Frisk

In a world where heroes rise and darkness lurks, a unique girl named Sans finds herself thrust into the vibrant halls of U.A. Academy. With a mysterious past and the pow...

What is wrong with Sans, and who is Gaster? This is such a reused Description. Undertale belongs to Toby Fox.

Everyone thought all the monsters were sealed Underground, but upon making it to the Surface, a couple monsters nobody has ever seen before starts to make an appearance.

Dr. Gaster made 1-S and 2-P to break the barrier and start a war. When he disappeared, they were scared, confused, alone. They broke out of their prison and Grillby rais...

Ink had a.. how do you word it? 'Odd' ? That's a good word, he had an odd dream. After waking up, since that day he's been having even more odd dreams. The Star Sans, In...

W.D. Gaster never meant to fall in love during the war. But he did. It resulted in heartbreak, a pup, and a high LV. So he experimented. 10 years and no more kid. So he...

(DISCONTINUED. GO TO THE ACTUAL AO3 WEBSITE TO READ OTHER CHAPTERS) https://archiveofourown.org/works/5350673 It's over. Frisk's journey has ended in the best way possi...

[[UNDERTALE SPOILERS!!]] After frisk had done the pacifist run many times, something gone wrong... Flowey never showed up in the end. So frisk lived in the underground w...

Mostly just pictures and some comics on Gaster Blaster Sans transforming or being a Blaster beast already. I do not own any artwork or au's shown in this book. Hope you...

A girl with a secret who meets a skeleton with the same one. Can they both control their fears and their forms for each other? or will one of them obtane the higher rank

Basically what it says in the description... Just some pictures of Feraltale and BB Trust Au. Also some other pictures such as Temmie, Doomfanger, and The Annoying Dog...

You can go to book one to see the first god if you want :)

Warning: this contains vore. If you don't like vore then please leave. Those who stayed, enjoy. Running through snow. "Help me!" " Fear" "It hur...

Before the events of Undertale. . . All was well in the underground. A skeleton named Papyrus was training to be in the Royal Guard and his skeleton brother Sans was par...

First Draft The Player has taken over Frisk and is wreaking havoc Underground over and over and over. Sans has broken from the carnage and sacrificed himself to let Papy...

I'm writing a fanfic on the back story of Sans and Papyrus. P.S most of this is based on pure theory

It is about a little human girl who meets a scary looking monster that is actually very sweet. The two go on an adventure of a lifetime and meet new friends and fight e...

Exactly what the title says! X3 enjoy! And if you want me to do and ink sans x reader I will! ( also the cover photo isn't mine)