If you tap the Left and Right triggers while alternating between them at the main menu, you will leave your seat to examine the wall. Close to the wall, you will find a small computer terminal. You can enter the following codes in this computer to achieve the corresponding results.

• 3ARC UNLOCK - Enter this code into the computer to unlock all regular and Zombie mode levels.
• 3ARC INTEL - Entering this will unlock and let you view all the intel in the game. (Note: Using this code will disable the Closer Analysis Achievement/Trophy.)
• DOA - This code will allow you to play the Dead Ops Arcade mini-game.
• ZORK - Unlocks Zork I: The Great Underground Empire - which is an interactive fiction computer game from the early 80s.
• HELP - This is a system help command which will give you a list of all available commands that you can use on the computer terminal.
• DIR - Gives a list of all files which you can open using the CAT command. If you wanted to open a file name test.txt for example, you would open it using the command: CAT test.txt
• WHO - This command lists all login names that could be used with the RLOGIN function.
• RLOGIN - RLOGIN is the command you would use to login with a username once you have both the username and its password. Please see the hint titled "Terminal Login Names & Passwords" to get these credentials.
• ALICIA - "Alicia" is a virtual therapist that you can access if you enter this code.
• FOOBAR - Entering this code will give you the following message: "Fee Fie Foe Foo!".

You can unlock the Zombie Mode by beating the game on any difficulty level. This mode can also be unlocked by entering the code "3ARC UNLOCK" in the cheats menu.

Below is a list of usernames and passwords that you can enter at the terminal to log in to the system using other peoples account. Once you have logged in to the system as another user, you can view their files using the DIR or ls command. You can access their email by typing MAIL.

Once at the terminal, enter LOGIN then type the username and password from the list below.

• Alex Mason - Username: amason - Password: PASSWORD
• Dr. Adrienne Smith - Username: asmith - Password: ROXY
• Bruce Harris - Username: bharris - Password: GOSKINS
• D. King - Username: dking - Password: MFK
• Frank Woods -Username: fwoods - Password: PHILLY
• Grigori Weaver - Username: gweaver - Password: GEDEON
• John F. Kennedy - Username: jfkennedy - Password: LANCER
• Joseph Bowman - Username: jbowman - Password: UWD
• Jason Hudson - Username: jhudson - Password: BRYANT1950
• J. Turner - Username: jturner - Password CONDOR75
• John McCone - Username: jmccone - Password: BERKLEY22
• Lyndon Johnson - Username: lbjohnson - Password: LADYBIRD
• Ryan Jackson - Username: rjackson - . Password: SAINTBRIDGET
• Richard Helms - Username: rhelms - Password: LEROSEY
• Richard Kain - Username: rkain - Password: SUNWU
• Richard Nixon - Username: rnixon - password CHECKERS
• Terrance Brooks - Username: tbrooks - Password: LAUREN
• T. Walker - Username: twalker - Password: RADI0
• V. Bush - Username: vbush - Password: MANHATTAN
• William Raborn - Username: wraborn - Password: BROMLOW

You can use the following usernames and passwords to login to the Dreamlad remote system using the RLOGIN command:

• R. Oppen - Username: roppen - Password: TRINITY
• V. Bush - Username: vbush - Password: MAJESTIC1
• T. Walker - Username: twalker - Password: THANKSDAD