checked-no =>Furious Mode: Complete Normal Mode to unlock this harder difficulty mode. =>God Mode: Complete Furious Mode or Normal Mode twice to unlock this mode, which grants you unlimited ammo and all weapons. =>Unlock Everything: On the main menu, press X Y R L X. A zombie will moan and the screen will turn red. All extras and missions will now be unlocked, and while playing you can use [L] and [R] to switch between cameras.