I downloaded COD4 Demo to mess around with the settings, and it runs OK on low settings, I can deal with it until I can save up enough money for an ASUS. Everything passes on 'Can You Run It?' except for my graphics card, which is a Mobile Intel(R) 4 Series Express Chipset Family, which I don't know what it is but it sounds horrible. How much would a better graphics card be? Would it be worth it to put one in? Can I even do that on this laptop?