Unlock all doors 
Pause the game, then hold L1 + Triangle and press 
Square, Square, Triangle, X, Circle, Square, Triangle. 

Level select
Pause the game, then hold L1 and press 
Circle, X, Circle, Square, Square. 
This can alsobedone at the main menu.
From: Micha van der Loo

Invincibility
Pause the game, then hold L1 and press 
Square, X, Triangle, Triangle, X, Square, Circle, Circle. 
This can also bedone at the main menu.
From: Micha van der Loo
 
Full health entire team
At the main menu, hold L1 and press 
Triangle, Triangle, X, Circle, Circle, X, Square, Square.
From: Micha van der Loo
 
Hostages can not be killed
Pause the game, then hold L1 and press 
Circle, Circle, Square, Triangle, X, Triangle, X, Circle. 
This can also be done at the main menu.
From: Micha van der Loo
 
Carry all items
Pause the game, then hold L1 and press 
Triangle, X, X, Circle, Square, Circle, X, Triangle. 
This can also bedone at the main menu.
From: Micha van der Loo 

All maps
Pause the game, then hold L1 and press 
X, Circle, Square, Triangle, Triangle, Square, Circle, X. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

Full health for entire team
At the main menu, hold L1 and press 
Triangle, Triangle, X, O, O, X, Square, Square.
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

All main guns
Pause the game, then hold L1 and press 
X, O, O, Triangle, Square, X, Square, O. 
From: The_new_alien00@hotmail.com

All secondary pistols
Pause the game, then hold L1 and press 
X, Triangle, Square, Circle, Square, X, Triangle, Square. 
From: The_new_alien00@hotmail.com

Extra ammunition
Pause the game, then hold L1 and press 
Square, Square, Circle, Triangle, X, Triangle, X, Triangle. 
From: The_new_alien00@hotmail.com

Carry all items
Pause the game, then hold L1 and press 
Triangle, X, X, Circle, Square, Circle, X, Triangle. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

Baseball bat weapon
Pause the game, then hold L1 and press 
O, O, Square, X, Triangle(2), O, X. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

No terrorists
Pause the game, then hold L1 and press 
Triangle, O, O, Triangle, Square, X, Triangle, O. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

Upside down terrorists
Pause the game, then hold L1 and press 
X, X, O, Square, O, O, Triangle, Circle. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

Supermen mode
Pause the game, then hold L1 and press 
X, Square, Triangle, Triangle, Circle, Square, X, X. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

Free-for-all mode
Pause the game, then hold L1 and press 
Circle, Triangle, Triangle, X, Circle, Square, X, Triangle. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

View ending sequence
Pause the game, then hold L1 and press 
Square, Triangle, Square, Square, O, O, X, Triangle. 
Note: This may also be done at the main menu. 
From: The_new_alien00@hotmail.com

Moon walk
While playing a game, hold L2 + Circle to do the moon walk. 
From: The_new_alien00@hotmail.com