The legendary Metal Gear series returns with a whole new gameplay system utilizing strategic battle cards that focuses on deep tactical strategy with an entirely new Metal Gear storyline. As the role of top-secret agent, Solid Snake, players will make calculated decisions to plan out their infiltration strategy and accomplish the mission in a turn-based style of game. METAL GEAR ACID™ delivers the trademark stealth-action experience in a new game for the PSP handheld system.