Set five years after the events of Metal Gear Solid 2: Sons of Liberty, the story centers around a prematurely aged Solid Snake, now known as Old Snake, as he goes on one last mission to assassinate his nemesis Liquid Snake, who now inhabits the body of his former henchman Revolver Ocelot under the guise of Liquid Ocelot, before he takes control of the Sons of the Patriots, an A.I. system that controls the activities of PMCs worldwide.
In MGS4, players assume the role of an aged Solid Snake (also referred to as Old Snake), using stealth, close quarters combat, and traditional Metal Gear combat. The overhead third-person camera of earlier games has been replaced by a streamlined view and over-the-shoulder camera for aiming a weapon, with an optional first-person view at the toggle of a button.
