FRONT MISSION 4 marks the debut of the popular mech-based strategy game series on the PlayStation 2. Utilizing the technological capabilities of the system, FRONT MISSION 4 brings you the newest chapter in the best-selling series. While boasting an enhanced battle system, outstanding new graphics and dramatic voiceovers, FRONT MISSION 4 maintains the outstanding strategic gameplay that has won acclaim from both gamers and press worldwide. As in the previous games, players can fully customize their wanzers, or mech units, with a variety of powerful weaponry and parts. In addition, new tactical features such as the "Link System" bring a new dimension of strategy to the game.

The game opens as an unidentified group of wanzers assaults and destroys an E.C. German base. Elsa, a new recruit in the E.C.'s Durandal corps, is sent to Germany with her team to investigate the attack. The story then shifts to Darril, a U.C.S. Army sergeant in South America. He and his company are sent to Venezuela after its governor declares independence from the U.C.S. Though Darril's squad seems far more interested in slacking off than fighting a war, their plans for early retirement are put on hold after they witness a fateful plane crash in the jungle.