Metal Gear Solid: Peace Walker (メタルギアソリッド ピースウォーカー, Metaru Gia Soriddo Pīsu Wōkā) is a video game produced by Konami and Kojima Productions that was released for the PlayStation Portable in 2010. Peace Walker is the fourth Metal Gear title for the PSP, although it is only the second to be considered part of the series' main canon, following Metal Gear Solid: Portable Ops. It is also the first game in the series for a portable platform to be directed by series' creator Hideo Kojima. Peace Walker's original title was Metal Gear Solid 5: Peace Walker. The development team that worked on Peace Walker is as large as the team that worked on Metal Gear Solid 4: Guns of the Patriots.
Set in 1974 in Central America, the game follows the exploits of returning protagonist Naked Snake, now known as Big Boss, as he runs a mercenary unit using the resources he acquired from Gene at the end of Portable Ops, four years before. The game also adds more information behind the founding of the military state Outer Heaven.
Some changes are made to the standard Metal Gear Solid formula. Movement is done on the analog stick; actions such as co-op actions use the directional-pad; melee actions, which...