Okay, if you're reading this you must be considering to buy this game.  I'm not going to go into all this technical stuff cause everyone has pretty much covered it. For the price right now, it's really cheap and worth it.  If you're a fan of shooters, get this game.  It's up there with Counter-strike and they are both good games in a different way.  Even if you don't play online or have a slow connection, the bots are amazingly realistic and fun.  Even playing the solo tournaments are fun cause they give you different challenges.  I highly recommend this game and it's money well spent!