ItsMods

You can unlock the map without finishing the campaign.

In the console on the menu (stand up; walk to terminal) enter:
3ARC UNLOCK

Thanks for the info

To unlock Dead Ops Arcade, simply type DOA at the terminal.

To unlock the text game Zork, type "zork" at the terminal.

To unlock intel 3ARC INTEL

To unlock spam, wait it's already unlocked.

I don't think this was spam untill you came, people gave usefull information

Maybe a thread should be made with all the unlocks in 1 post :p?