What was Fallout based on?

What was Fallout based on? Fallout started as a game engine—a framework for a video game—that Cain was developing during his spare time, based on the tabletop role-playing game Generic Universal RolePlaying System (GURPS).

Fallout started as a game engine—a framework for a video game—that Cain was developing during his spare time, based on the tabletop role-playing game Generic Universal RolePlaying System (GURPS).