Metal Gear Solid: Peace Walker is a video game developed by Kojima Productions and published by Konami. It is part of the Metal Gear series and serves as a direct sequel to Metal Gear Solid 3: Snake Eater. Set in 1974, players control Big Boss as he builds his private mercenary army in Costa Rica, encountering a new threat from a mysterious organization. The game features stealth-based gameplay and a compelling narrative that expands the series' lore.