At the title screen hold R1 and press Down x2, Up x2, Square, Circle, Square, Circle, Triangle, Up x2, Triangle to unlock the MTAR-21
Unlock M468 Assault Rifle
At the title screen hold R1 and press Up, Triangle, Down, X, Left, Square, Right, Circle, Left,Left, Right, Square to unlock the M468.
GI John Doe Mode
During the game pause and hold R1 and press L3 L3 X R3 R3 O L3 L3 Square R3 R3 Triangle. This code also works in multiplayer mode but must be entered by the host.
Single player cheats
Start a single player game and pause it then hold R1 while entering one of the following codes.
|Square, Circle, Square, Circle, L3, L3, Triangle, X, Triangle, X, R3, R3
||3rd Person View
|O, Square, X, Triangle, L3, Triangle, X, Square, O, R3
||Enable Big Head Mode
|L3, R3, L3, R3, X, O, L3, R3, L3, R3 Square, Triangle
||Enable One Hit Kills (Effect is also enabled upon the player)
|X, X, Circle, Circle, Square, Square, Triangle, Triangle, X, Circle, Square, Triangle
||Super Ragdoll Mode
At the main menu, select "EXTRAS", then select "Comcast Gift". Use the pop-up keyboard,to enter Comcast faster and unlock the bonus map.