Gran Turismo 4 cheat codes discovered nearly two decades after the game's release - Variable

A player had discovered cheat codes for Gran Turismo 4. The codes remained hidden in part because they only become available once 365 in-game days have passed. Read more at Variable

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Gran Turismo 4 Cheat Codes Uncovered Nearly 20 Years After Release

Gran Turismo 4 Cheat Codes Discovered Nearly 20 Years After