Gran Turismo 4 Cheat Codes

These codes are usable only after 365 game days have passed.

10,000,000 Credits (GT Mode Screen)	Select, Left, Right, Right, Down, Up, Up, Left, Down, Up, Right, Left, Down, L1, R1, Select
Pass Any License (License Selection Screen)	Select, R1, Select, R1, Select, L2, L2, R2, R2, L1, Select, L1, Select
Gold Any Specific License Test (License Test Selection Screen)	Select, Select, R1, R2, L2, L2, Select, L1, R1, Select, R2, L1, Select
Gold Any Event (Event Course Selection Screen)	Select, L1, Up, Up, Select, R1, Down, Down, Select, L2, Select, R2, Select
10,000,000 Credits (Mission Hall)*	Select, R2, Select, R2, L1, L2, L2, Select, L1, R1, Select, R1, Select

* It is presumably implemented incorrectly and should instead allow completing any mission.