(Jyri Jokinen, 22.08.2009 - 00:00) From the development powerhouse that has shipped more than 52 million units worldwide, Polyphony Digital Inc.(PDI), the award-winning Gran Turismo™ franchise is now on PSP®(PlayStation®Portable) for the first time. Developed exclusively for PSP by the internal team of designers and engineers at PDI, Gran Turismo™ is built for optimal performance and fun racing excitement on the portable platform.