For Portuguese-speaking players, the language support in Peace Walker is specific:
The story is set in 1974, ten years after the events of Metal Gear Solid 3: Snake Eater . Players take on the role of Naked Snake, now known as Big Boss, as he leads his private military company, "Militaires Sans Frontières" (Soldiers Without Borders). He is drawn into a conflict in Costa Rica, a nation without a military, which has been infiltrated by a mysterious armed force. metal gear solid peace walker psp ptbr work download