Gran Turismo 4: Prologue (2003) - MobyGames

Gran Turismo 4: Prologue is a lite version of the later released game Gran Turismo 4. In reality, this game, although a full game in its own right, is really nothing more than a extended demo of what to expect in the final release of Gran Turismo 4.

Gran Turismo 4: Prologue (2003) - MobyGames

Gran Turismo Prototype builds

Gran Turismo 4 (2004) - MobyGames

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Gran Turismo 4 Prologue

Gran Turismo 4 Prologue, Gran Turismo Wiki