Gran Turismo (グランツーリスモ, Guran Tsūrisumo, also previously known as Gran Turismo 4 Mobile, Gran Turismo Mobile, Gran Turismo 5 Portable and Gran Turismo Portable) is a 2009 PlayStation Portable (PSP) 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 original PSP. Following five years of delays and speculation, it made a reappearance at E3 on June 2, 2009 in a playable form.