Unlimited ammunition:
Enter DISCUS at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat.

Immortality:
Enter BENGAL at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat.

Bullet shield mode:
Enter GOURAMI at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. All bullets that are fired at you will be ineffective and will not damage you.
Information in this section was contributed by Aaron Evans.

Silver bullet mode:
Enter PLECO at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. Silver bullet mode allows enemies to be killed with one shot.
Information in this section was contributed by Aaron Evans.

Rubber grenade mode:
Enter MOOR at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat.
Information in this section was contributed by Aaron Evans.

Snipe-O-Rama mode:
Enter LELEUPI at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. This cheat allows all guns to zoom like a sniper rifle.
Information in this section was contributed by Aaron Evans.

All replay items:
Enter LOACH at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat.
Information in this section was contributed by Aaron Evans.

Perfectionist:
Enter BOTIA at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. This cheat allows the Japanese to kill you with one shot.
Information in this section was contributed by Aaron Evans.

Men with hats:
Enter TETRA at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. Characters will have various objects on their heads.
Information in this section was contributed by Aaron Evans.

Invisible soldiers:
Enter ZEBRA at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. All that you will see is their guns and helmets.

Achilles head mode:
Enter CICHLID at the password screen at the options menu. Select the "Bonus" option to enable/disable this cheat. The Japanese can only be killed with a headshot when this cheat is active.
Information in this section was contributed by Aaron Evans.

All missions:
Enter ALBINO at the password screen at the options menu.