Here is a topic for people to put in the codes that they know here are the ones i know of.

Also to get out of the Chair where you see the Campaign,Multiplayer and Zombies screen hit LT and RT.

Codes i know of to Date.

On the Computer type "3ARC UNLOCK" to unlock the "Five" Zombies mode map, Dead Ops Arcade game, Zork (The Great Underground Empire) text-based adventure game, and all missions.

On the Computer type "3ARC INTEL" as a code to unlock all Intel. Using this code prevents you from getting a certain Achievment i forget what one Sorry.

On the computer type "DOA" as a code to unlock the Dead Ops Arcade game. Its Basically a mini version of regular zombies!

On the computer type "ZORK" as a code to unlock the Zork. Its a Text Based Game. Also when you play it you get an achievement

On the computer type "HELP" as a code to display a list of system commands in the terminal and Pentagon user e-mail access.

On the computer type "CAT" as a code. I dont know what this one does.

On the Computer type "DIR" as a code to display a list of audio files and pictures.

On the computer type "WHO" as a code to display a list of login names for use with the "RLOGIN" command (requires passwords).


That's all i know of so please Post ones you find

HOPE THIS HELPS!!