It is really a great ideal in putting bitcoin in a game that every people may love and get addicted with, but I think we can only apply it to the online payment needed in the game and not the game itself gonna provided us with bitcoin, and like Pokemon that are free for all I think it can not apply to something like that, because this kind of game present us with Pokemon and that is the main motif, but if they would make a game that can earn bitcoin, try to make a related and close to bitcoin faucet kind of thing, it needs the vise versa factor of the faucet that lets you play and easily earn bitcoin from it as a reward, it can surely work as long as there is a kind of advertising to the side of the developer of that kind of bitcoin game.