This article is pretty cool. Good read on what the game offers... Says here there's 1000 cars. And there's a prototype car which removes all restrictions imposed on today's cars: 'At the same time he was secretly developing the ultimate race car for GT5, appropriately titled Project X1 Prototype. Developed with the Red Bull F1 team and with Red Bull's design genius Adrian Newey as technical advisor, it was borne out of a simple Yamauchi question: What would a racing car, freed of all technical regulations, look like? "We pushed the boundaries of what's possible to come up with the fastest race car on the planet," teases Yamauchi, who gave us a split second, abstract glimpse of the car. All I can tell you it has a shape that conjures up something between a Le Mans race car and an F1 machine. We'll have to wait until early November to see the full picture.'