Metal Gear Solid: Peace Walker

Metal Gear Solid: Peace Walker is an action-adventure stealth video game and the third action-based Metal Gear title made specifically for the PSP. The gameplay consists of two primary modes: Mission and Mother Base. Missions are the action sequences of the game, where the player must infiltrate enemy territory or fight a boss, whereas Mother Base is army management. Some changes have been made to the standard Metal Gear formula: the player is now unable to move or shoot while lying down and while pinned to a wall, making Peace Walker the first game since Metal Gear to lack any crawling ability. The story is set in 1974 in Costa Rica, where Big Boss leads the mercenary group Militaires Sans Frontieres. Soldiers captured in the field can be recovered with the Fulton system and sent to Mother Base, where they are assigned to teams such as combat, research and development, medical and intelligence. Missions can be played alone or in co-op with up to four players, and the co-op missions include boss fights against large weapons.