Pause the game (F1 key) and enter one of the following passwords and then unpause the game to make them work.
HIRAKE GOMA - All-access code. Gives you all eight keycards.
INTRUDER - Allows you to carry an almost unlimited ammount of ammo and explosives.
ISOLATION - Allows you to carry up to 999 rations.
DS 4 - Get promoted to an extra rank.
ANTA WA ERAI - Literally means ''You're the best''. Gets you promoted to a four-star rank.
Trick 1 - Keep entering and exiting trucks and rooms that contain
rations or ammo to get max ammo or rations.
Trick 2 - To make an item reappear without the need of leaving and re-
entering the room, simply pause the game (F1) and press F4. Then press
ESC and then F1 to un-pause. The item will regenerate itself in the
same position.
