Well, in 'real life', people drive on the left because swords were drawn from the right (in horseback knight times), allowing easy access to attack, which is the same reason people shake hands with the right hand, so as to show they are coming in peace and will not draw swords, as the right hand is busy. As for games, well i guess it depends when they were made, where, and if they are track racers. Race tracks generally do not have a preference.