Well, how old are you?ok, it's because my parents are really stupid and follow the ratings like law with no reason whatsoever.
i need the game mainly for gmod content anyway, and i'm fine playing it. i play gmod in all sorts of violent ways, and have played other fpses for a few years. my dad says "it makes you numb to the violence", which it doesn't. i HATE violence in real life, and i see no reason i shouldn't play the game. and my mom's view is "the box says it's for 17 year olds".
he could have actually thought someone was dumb enough to buy a second copy. also, lemon you can wait...would you rather just be in trouble for having it on your pc and then being banned from playing pc games?