Sony Computer Entertainment Europe today announced that Gran Turismo 5 Prologue, the fifth installment of the billion-dollar selling racing franchise developed by Polyphony Digital, has sold 1.5 million copies across Europe only. The game comes with in depth car tuning, which allows players to adjust the vehicle's performance, including power, tyres, suspension and the ability for quick tuning whilst racing, a drift mode and a two-player split screen mode, as well as scheduled race events.