Big Boss returns to battle in this all-new MGS action game for the PSP system. Set in 1970, the game acts as a missing link in the ongoing Metal Gear Solid narrative, as players learn more about returning characters such as Para-Medic, Major Zero and Sigint and also witness Big Boss' greatest tragedy -- one that sets into motion the events of later games in the series' timeline. Portable Ops introduces a new team building mechanic that brings additional depth and gameplay variety to the series -- players can now capture and recruit characters and train them to be part of their army to help Snake on his mission! The game also features fully-voiced cut scenes with original artwork by acclaimed visualist Ashley Wood.