'' Gran Turismo '' is a PlayStation Portable game developed by Polyphony Digital . The game was announced at the E3 Sony press conference on May 11 , 2004 , the same conference where Sony announced the PlayStation Portable . It has since been delayed repeatedly and its completion has been pushed back . At E3 2009 , Gran Turismo PSP was finally confirmed for an October 1 , 2009 date , and was launch title for the PSP Go . The game was intended to be an exact port of '' Gran Turismo 4 '' , although it could include cars from '' Gran Turismo 5 Prologue '' and cars to be featured in '' Gran Turismo 5 ''
E3 2009
E3 2009
Gran Turismo 4