The single-player campaign of Metal Gear Solid: Portable Ops follows the events of Metal Gear Solid 3: Snake Eater, as Naked Snake establishes FOXHOUND in an attempt to hunt down the treacherous FOX unit, which has started a bloody revolt in South America. Set in 1970, the game will be the missing link in the ongoing Metal Gear saga, as players will learn more about returning characters such as Para-Medic, Major Zero and Sigint and also witness Naked Snake's greatest tragedy – a loss that sets into motion the events of later games in the Metal Gear Solid timeline.

GAME FEATURES
* Refining the gameplay of the online multiplayer mode from Metal Gear Solid 3: Subsistence, Metal Gear Solid: Portable Ops lets players engage in online skirmishes through the PSP system's wireless infrastructure functionality.

* Players will be able to use their squadron from the single-player portion of the game as well as recruiting new members and trading with other players, unleashing their distinctive abilities and wreaking havoc across the game's numerous multiplayer levels.

* Metal Gear Solid: Portable Ops also introduces a new "White Flag" system to the game's multiplayer modes, letting players choose to surrender and live to fight again in each round or fight to the death until the next game begins. Placing emphasis on stealth gameplay, the White Flag System further evolves online play for the Metal Gear series and creates a bond between the player and their team as they work together to achieve their objectives.