Haha, I was totally going to say a "Spy Kids game"... Good one.
Or a game where you have to work for him in the studio,,, he's so picky, and such a perfectionist.. I bet it'd be like working for a mellowed-out, mexican Gordon Ramsay. What? There's a Hell's Kitchen video game... Why not a filmmaking video game?
But Robert used to have his own video game company, and he dropped it fairly quickly, so I don't think this is a real question anyway.