From the main menu press the following sequence of buttons on the controller: Z, Z, Y, Y, X, X, B, B, Start, Start.
To access the cheat codes in CDS II you need to enter the game options menu and select the �cheats� tab. From here you will have the following options:
Code - Effect
MISSION LIST - This allows you to play any level
TROOPER LEVEL - This increases the intelligence of your troop
NEXT MISSION - This skips to the next level in the game
INFINITE SAVES - This will allow you to save the game as many times as you like
ENEMY LEVEL IS ZERO - This will reduce enemies to their lowest level of intelligence
INFINITE AMMO - Your guns will never run out of ammo
Enable cheats
Go to the main menu then enter L, L, R, R, B, B, Y, Y, X, X. Now you will see a cheat menu in the game.