Codes
     At the title screen hold R1 and press the following:
     
Cheat code:                             Effect:
Down x2, Up x2, Square, Circle, 
Square, Circle, Triangle, 
Up x2, Triangle                         Unlocks MTAR-21 Assault Rifle

Up, Triangle, Down, X, Left, 
Square, Right, Circle, Left, 
Left, Right, Square                     Unlocks M468 Assault Rifle


Single player codes
     During a single player game, pause then hold R1 and enter codes

Cheat code:                             Effect:

X, X, Circle, Circle, Square, 
Square, Triangle, Triangle, X, 
Circle, Square, Triangle                Super Ragdoll Mode

Square, Circle, Square, Circle, 
L3, L3, Triangle, X, Triangle, 
X, R3, R3                               3rd Person View

L3, R3, L3, R3, X, O, L3, R3, 
L3, R3 Square, Triangle                 Enable One Hit Kills (Effect is also 
                                        enabled upon the player)

O, Square, X, Triangle, L3, 
Triangle, X, Square, O, R3              Enable Big Head Mode


GI John Doe Mode
     During game pause and hold R1

Cheat code:                             Effect:
L3 L3 X R3 R3 O L3 L3 
Square R3 R3 Triangle                   Red & Blue Tracers (also works online, 
                                        host must enter code)


Comcast Multiplayer Map
     At  the  game's  main menu, select "EXTRAS", then select "Comcast
Gift" in the submenu. Using the pop-up keyboard, enter the password.

Password:                               Effect:
Comcast faster                          Comcast multiplayer map