If he still makes time for you and does not neglect you then just let him be. Why create an "issue" if there is no issue... he likes to play games, and you have things you like to do too, right? if he can understand you (and the things you do) and maybe you should try understand him and his passion for games... genuinely take an interest in his interest.

Unless, he plays too much games that he neglects everything else- work, family, you etc. if not, then, just let him have his games