Custom Mission Map Select for Tom Clancy's Rainbow Six 3 - PlayStation 2
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Custom Mission Map Select
Press Start at the main menu to enter the menu with 'Campaign', 'Custom Mission', 'Split Screen', and other options.
Press L1, R2, L2, R1, Left, Right, Square, Circle to unlock all maps in custom mission mode.
This code also unlocks all difficulty settings for the the practice missions.