Cheat mode
At the main menu, use the Right Analog-stick to look down at your hand and see you are locked up. Repeatedly press L2 + R2 to escape from the chair
(unlocks the "Just Ask Me Nicely" secret trophy).
After breaking free, move around to the area behind your chair to find an old computer terminal you can use to access the Central Intelligence Agency Data System.
Type one of the following codes to access early unlockables and hidden features in the game.
Note:You can also plug a USB keyboard into your PlayStation 3 to enter the codes and play the Zork text-based adventure game.
Mission select,
"Five" Zombies mode map, Dead Ops Arcade game, and Zork game
Enter "3ARC UNLOCK" as a code to unlock the "Five" Zombies mode map, Dead Ops Arcade game, Zork: The Great Underground Empire text-based adventure game, and all missions.
All Intel
Enter "3ARC INTEL" as a code to unlock all Intel.
Note:Enabling this code will prevent the "Closer Analysis" trophy from being earned.
Alicia game
Enter "ALICIA" as a code to unlock the Alicia virtual therapist game.
In the Terminal, Enter "HELP" as a code to display a list of system commands in the terminal and Pentagon user e-mail access.