Gran Turismo 5 Prologue (グランツーリスモ5 プロローグ, Guran Tsūrisumo 5 Purorōgu) is a PlayStation 3 exclusive title which was announced at the E3 2007. This short version title is a precursor and sampling of Polyphony Digital's planned Gran Turismo 5 and replaces Gran Turismo HD Concept. The "Prologue" suffix is a self-reference to Gran Turismo 4 Prologue which was released one year before the full version of Gran Turismo 4. Since October 3, 2008, the game is now referred to as Gran Turismo 5 Prologue Spec III which is the software's version 3.0 title.