Peace Walker follows Big Boss in 1974, shortly after the events of Snake Eater, as he forms the mercenary outfit Militaires Sans Frontières that would lay the groundwork for what later became Outer Heaven. Kojima Productions designed the game specifically for PSP, with shorter missions built for handheld sessions and robust local co-op and base infrastructure, without sacrificing the dense stealth, base-management systems, and ambitious storytelling the series is known for.
It's widely regarded as one of the best games ever released for the console, and a central narrative piece of the Metal Gear timeline, with revelations that echo directly into Metal Gear Solid V. It remains essential both for series fans and for anyone curious how far stealth design went in handheld form.
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