Level select:
Pause game play, then hold L1 and press Circle, X, Circle, Square, Square, Triangle, X(2). Note: This may also be done at the main menu.

Invincibility:
Pause game play, then hold L1 and press Square, X, Triangle, Triangle, X, Square, Circle(2). Note: This may also be done at the main menu.

All main guns:
Pause game play, then hold L1 and press X, Circle(2), Triangle, Square, X, Square, Circle. Note: This may also be done at the main menu.

All secondary pistols:
Pause game play, then hold L1 and press X, Triangle, Square, Circle, Square, X, Triangle, Square. Note: This may also be done at the main menu.

Paintball gun:
Pause game play, then hold L1 and press Circle(2), Square, X, Triangle(2), Circle, X(2). Note: This may also be done at the main menu.

More ammunition:
Pause game play, then hold L1 and press Square(2), Circle, Triangle, X, Triangle, X, Triangle. Note: This may also be done at the main menu.

Full health for entire team:
Pause game play, then hold L1 and press Triangle(2), X, Circle(2), X, Square(2). Note: This may also be done at the main menu.

Hostages cannot be killed:
Pause game play, then hold L1 and press Circle(2), Square, Triangle, X, Triangle, X, Circle. Note: This may also be done at the main menu.

No terrorists:
Pause game play, then hold L1 and press Triangle, Circle(2), Triangle, Square, X, Triangle, Circle. Note: This may also be done at the main menu.

Supermen mode:
Pause game play, then hold L1 and press X, Square, Triangle(2), Circle, Square, X(2). Note: This may also be done at the main menu.

Free-for-all mode:
Pause game play, then hold L1 and press Circle, Triangle(2), X, Circle, Square, X, Triangle. Note: This may also be done at the main menu.

Open all doors:
Pause game play, then hold L1 and press Triangle, Square(2), Triangle, X, Circle, Square, Triangle. Note: This may also be done at the main menu.

Carry all items:
Pause game play, then hold L1 and press Triangle, X, X, Circle, Square, Circle, X, Triangle. Note: This may also be done at the main menu.

All maps:
Pause game play, then hold L1 and press X, Circle, Square, Triangle(2), Square, Circle, X. Note: This may also be done at the main menu.

View ending sequence:
Pause game play, then hold L1 and press Square, Triangle, Square(2), Circle(2), X, Triangle. Note: This may also be done at the main menu.

Unlimited ammunition:
Press Reload before your weapon is empty and your gun will be reloaded without losing any rounds.

Hint: Getting your men to stand up faster:
If you tell order one of your men to "guard the area", you might not be able to get him to stand up without aiming down and giving him a command. This takes too much time. Just shoot him once, and he will stand up. Only shoot him once or else it will waste ammunition and that mans health.

Hint: Get rid of terrorists in penthouse mission:
On the level were you have to download the information from man's computer in his penthouse, pause game play and enable the "No terrorists" code. Resume the game then immediately pause again, or you will fail the mission. Then, re-enable the "No terrorists" code and resume the game and there will be no more terrorists.

Glitch: Jumping:
The game will train you on how to jump, but you do not need to jump at all to get to higher levels. You can die from jump. Sometimes you may float for a bit from jumping and land, then get hurt.

Glitch: Ghost zombies:
When one of your teammates dies and you are not in the room, you will see him walking by and he is all black (body is missing). Then he walks into darkness and disappears. When you look at the life sign it will be flatlined.