The first real Metal Gear Solid game on PSP.
* 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.