Good news: Just for President's Day, Activision is unlocking Call of Duty: Black Ops'
two secret modes: Dead Ops Arcade
, the top-down dual-stick shooter
hidden in a DOS emulator, and the Presidential zombie fight
known as "Five" that's unlocked upon completion of the single-player campaign. They'll remain unlocked throughout the weekend -- free of charge -- so get 'em before they return to Easter Egg status.