Enter the following at the title screen:
Effect Code "add weapon" option added to the pause menu Up, Down, Left, Right, Circle, Square, Up, Down, Left, Right, Circle, Square acid trip mode Up, R2, Circle, Left, Triangle, Square, L2, L1, Circle, R1 god mode R3, L3, Right, Left, L1, R1, R3, L3, Right, Left, L1, R1 inf. ammo R2, R1, Triangle, L2, L1, Up, R2, R1, Triangle, L2, L1, Up unlocks all missions and pictures L2, R2, L1, R1, L1, L2, L2, R2, L1, R1, R1, R2
Contributed By: sony_PS301.
Easter Egg: Cowboy Operations In Vietnam
Enter Cowboy as your name when you start the game and when you enter special forces you will be wearing a cowboy hat in certain cut-scenes and movies
Contributed By: Oedipus Complex.
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