Its name is Gran Turismo 5 Prologue (demo), and it will be available to download for free on October 20th. The move is an effort to keep thumbs from atrophying after the long hiatus between GT4 ...

are giving gamers a first-of-its-kind driving experience by offering a camouflaged Corvette C7 Test Prototype as a vehicle download in the critically acclaimed PS3™ racing game Gran Turismo®5.