So, I've never been a GM before for anything at all! To be honest i'm pretty new as a player itself, I've only played two campaigns. However, I am interested in making a campaign for a game I love. The game does not have a book form like most campaigns here have, so I was wondering if I could set the campaign in the same world as the game/ have characters follow the same laws the game does. Is that possible to have a entire campaign based on a game that doesnt have a rule book? I really have no idea what i'm doing XD