This arcade shooter takes place in the year 2022, as the Earth Defense Force fends off an all-out attack by unknown life forms. Become an EDF soldier, battle against endless hordes of immense enemies, and restore peace to the earth.

Just what is this intelligent, extraterrestrial civilization that has attacked our own, known only as the Primers? Matching their intelligence, they bring the series' first humanoid alien foes. Battling against these intelligent foes will bring you to the depths of yet-unknown despair, and the heights of joy.

This entry has more missions and weapons than any before it. On top of that, all missions support online co-op of up to 4 players, as well as local split-screen. Control the 4 classes and play with EDF soldiers all over the world.

It all started in Japan, 2022. An immense fleet of starships laid siege to an EDF base located in the rough city outskirts in the Kanto region.

This was an enemy humanity had never encountered, the Primers. Even worse, enormous insects attack the EDF base built even further underground. The EDF fights back.