Sony is preparing to launch a special edition PlayStation Portable bundle to coincide with the release of Metal Gear Solid: Peace Walker. The upcoming installment is exclusive to Sony's PSP and should hit shelves on June 8. In addition to standalone copies, major retailers across the US and Canada will offer MGS: Peace Walker MGS: Peace Walker once again stars Naked Snake, and is set after the events of MGS: Snake Eater and MGS: Portable Ops, which were prequels to the original Metal Gear.