Gunmetal
Unlock entire game
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enter the following sequence at the mission select screen:
LTHUMBSTICK BUTTON, BLACK, RTRIGGER, RTHUMBSTICK BUTTON,
WHITE, LTRIGGER
Switch front-end music
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enter the following sequence anywhere in the front-end:
LTHUMBSTICK BUTTON, LTHUMBSTICK BUTTON, RTHUMBSTICK BUTTON,
RTHUMBSTICK BUTTON, LTRIGGER, RTRIGGER
Spoof Mission Briefing
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enter the following at the armoury screen before launching missions
1, 3, 6, 8, 9 & 14 only).
LTRIGGER, LTRIGGER, RTRIGGER, RTRIGGER, LTHUMBSTICK BUTTON, RTHUMBSTICK
BUTTON
