At the cheat menu, press R + C-Left, L + Left, Up, L + R + Right, Right, L + R + C-Left, L
+ R + C-Left, R + Down, R + Left, R + C-Left. If you entered the code correctly, you will
hear a sound. Exit, then return to the cheat menu to access the unlocked option.

At the mission selection screen, press R + C-Up, L + Down, R + C-Right, L + Left, L + R +
Up, L + R + C-Down, R + C-Right, R + Up, L + R + C-Down, R + Up.

At the mission selection screen, press R + Left, R + C-Down, R + C-Right, L + R + Left, L
+ Right, R + C-Down, L + Left, L + R + C-Left, L + Up, L + C-Up.

At the mission selection screen, press R + C-Down, R + Left, L + R + Up, R + Right, R +
Down, R + Down, R + Up, R + C-Left, R + C-Up, L + R + Left.

At the mission selection screen, press L + R + C-Down, L + R + C-Down, L + Right, L + R +
Left, R + Left, R + C-Right, L + R + Left, R + C-Up, R + C-Down, R + Right.

At the mission selection screen, press L + C-Down, R + Right, L + C-Right, R + C-Left, L +
C-Down, L + R + Left, L + C-Right, L + R + Up, R + C-Right, L + Up.

At the mission selection screen, press R + C-Left, L + R + C-Up, L + Left, R + Up, R +
Left, L + Up, R + C-Down, L + Right, L + C-Right, L + R + Down.

Obtain two sets of paired weapons that appear next to each other in your weapon list and
some ammunition for each gun. (For example, in the Military Archives level, obtain two
Dostoveis and two Klobbs). Then, cycle through the weapons until two of the second set of
weapons are ready. Now, quickly press the following set of buttons: Hold A button, then
before the weapons cycle forward, press Z(2). Release A, then press A once Press Z to fire
two or three times while the weapons are cycling. If done correctly, firing the weapon
will lock one of the weapons during the cycle, allowing a mixed set.