As another arm chair counselor, I'd like to throw my response in. This post makes me think that there are some more deep seeded issues and that going to too many games is just the playground where you are seeing it unfold. If you replace state games with hunting, or going to magic the gathering card tournaments, or the golf course, it seems like you would get the same output from your wife.
Side note, what's your relationship with your FIL like?
Edit: Just realized that I'm asking questions that have already been answered. It seems like the resolution you need is going to have to come from some real heart-to-heart honest conversation. If she's unwilling to do that, and it seems like she is opposed to the idea of you as an independent person within the relationship, then I don't know.
Not saying that you should divorce her because you're the man and how dare a woman question you. But it may be time to start thinking about the reality that people change and that's okay and if you cannot get to a place where you can both be happy, we'll be here to support you.