Slip and slide...
	Sluggish controls...
	Walls and barriers...
	Warfighter mode...

While running, quickly tap L3 to slide along the ground or hold L3 to do a sort of belly flop and slide on your stomach.

If you are carrying a large automatic weapon, the controls will feel sluggish because of the weight of the gun. However, if you switch to a hand held gun, the controls will be more responsive.

You cannot hide behind walls or barriers in first person view unless you plan on staying at that location for awhile. Unlike third person view where you can just tap Triangle to automatically hide, you must hold Triangle in first person view to hide. Press Up to look over a barrier or to open fire. Press Left or Right (depending on how you are positioned) to look out.

Successfully complete the game on any difficulty setting to unlock the Warfighter difficulty setting.