Gran Turismo 4 Prologue (グランツーリスモ4 プロローグ Guran Tsūrisumo Fō Purorōgu?) is a racing video game of the Gran Turismo series for Sony PlayStation 2 which is published by Polyphony Digital. It was released on December 4, 2003 in Japan and Southeast Asia and May 26, 2004 in Europe.[1] For undisclosed reasons, the game was not released in the North American market. This short version title preceded the release of the full-length version Gran Turismo 4 in 2004 and was followed by Gran Turismo 5 Prologue in 2007.