Metal Gear Solid: Peace Walker is an action-adventure stealth game for the Sony PSP, developed by Kojima Productions. Set in the Cold War era, players assume the role of Big Boss, leading a mercenary unit in 1970s Central America. The game introduces a base-building mechanic alongside mission-based gameplay, featuring both single-player and co-op modes. Emphasizing tactical espionage, players must navigate enemy territory undetected, utilizing a variety of gadgets and weapons. Its compelling narrative and strategic gameplay make it a standout title in the Metal Gear series.