This President's Weekend must be a big deal. (Perhaps?) Not only is Uncharted 2 on board, but now Call Of Duty: Black Ops is deciding to celebrate too. Activision's decided to unlock two of Black Ops' hidden Easter Eggs for the weekend, including the Dead Ops Arcade game and the Presidential zombie fight unlocked at the end of the campaign. Of course, tuned in players will already have experienced both hidden modes.