Unlock Bin Laden:
In the Afghanistan-Pakistan border mission press 'Start' to pause game-play and enter Circle, Circle, Circle, Square, Square, Square, R2. A sound will confirm correct code entry and every 6th enemy will be Bin Laden or a double of him.

Unlock Cheat Menu:
Press Circle 5 times and Square 4 times at the Title Screen and if you have entered the code correctly you will hear a sound as confirmation. At the 'Special Features' menu you'll be able to see what cheats have been activated and can be toggled on or off before you start the game