Ha, you're assuming that every person on earth has one of the consoles that can play the game. But the most units of one console sold (That I have seen) Is about 25 million, so if you get the amount of games you sold to that console (10 Billion) and divide it by the amount of consoles (25 million) then you get about 400 copies of the game per console.... I guess its a pretty good game if each person buys it about 400 times.