People are complex; its always going to take a lifetime or more if you want to get to know someone. You are never going to know "the whole truth".
However, everyone has things that they want and need. If a guy wants to have kids, he is going to want a woman who is (a) healthy enough to have kids, and (b) going to be a good mother for them.
as far as playing a game goes... that's a long time you might be in for if you start playing that one. Could be a 'rest of your lifer' game.