if u really want to experiance COD4, u have to play it on xbox 360. BUt COD4 is an ok multiplayer game, and an insanely awesome campaign game. i'v almost beat all the campain lvls on veteran. BUt anyway, thats kinda mean to sell it for 70$ on steam when u can get it for 50$ at best buy or sumthin. But if u dont have an xbox 360, and have enough money, its deffinitly worth it to pay 70$ to get it.