At the title screen, quickly enter one of the button combinations indicated below for the corresponding effect.

Code	Effect
X, LEFT, TRIANGLE, SQUARE, X, SELECT	All guns.
X, L2, TRIANGLE, R2, SELECT	Select mission.
R1, L1, L1, R1, R1, R1	Quick Mission map select.
L1, L2, R1, R2, X, SELECT	Special features.
L1, R2, R1, L2, CIRCLE, UP, L1	Extra health and armor.