[quote=@Hayazo]
Looks like it could be cool. How much input into the worldbuilding will the players have?
[/quote]

See now, this is another pickle. Depends on what you mean by input.

Personally I think the most and best input into worldbuilding should be the character's CS. Want your character to have a pet buffalo-falcon that tills fields and breathes fire? Ok sure that exists now. Maybe your grandpa is a secret agent for a mountain monastery of Kangaroo worshipers. Ok sure, but the nature and development of said Kangaroo worshipers, as well as all their NPCs, is mine to decide and control. They may become a part of the plot someday.

I have to be absolutely sure that no one else knows more about the game world than I do, and that I have complete manipulative control over everything but the characters themselves, or else I get nervous about stepping on people's creations. Players may have amazing ideas, but I can't waste time and energy trying to awkwardly screw them into actual gameplay. This is how plots are murdered.

In short, let's just use the KISS method. If it branches out beyond your character's direct experience, feel free to suggest an idea to be mined in the future, but don't get attached to it. :)