All IntelĮnter ' 3ARC INTEL' as a code to unlock all Intel. Mission select, 'Five' Zombies mode map, Dead Ops Arcade game, and Zork gameĮnter ' 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. Note: You can also plug a USB keyboard into your Xbox 360 to enter the codes and play the Zork text-based adventure game. Type one of the following codes to access early unlockables and hidden features in the game. 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. Repeatedly press LT + RT to escape from the chair (unlocks the 'Just Ask Me Nicely' secret achievement).
At the main menu, use the Right Analog-stick to look down at your hands and see you are locked up.
