20XX, the human race has successfully repulsed the giant aliens from outer space. But good times do not last, the unimaginable happens just after 3 months. This time, the invading combat biological weapons are even more evolved and can fly and even burrow! A giant ant hole deep in the depths of the Earth is the breeding grounds of masses of evolved enemies. The nightmare-like war is not over yet. Can the human race defeat the alien invaders again and restore peace to Earth? After ferocious fighting, scarred Earth is finally at peace. The aliens that were thought to have been eliminated hide their hive deep underground, producing more evolved new species with better combat capabilities to conduct an invasion against the human race again! The player takes on as a soldier in the Earth Defense Force, using various different weapons to fight with giant insect-like life forms with great destructive powers many times his her size. The more evolved insect-like aliens not only have greater strength, but also possess more varied attack patterns. The evolved new alien types include fast and flight-capable flying insect (winged ant); web-spewing arachnid with amazing jumping abilities (spider); and at least 30-meter long myriapoda (centipede). In order to overcome these new alien forms, the Earth Defense Force also has new blood injected – flying female combatant . Using double firepower from the airmobile force and heavy ground weaponry, the fun of the game is multiplied! Gamers, do battle with these aliens ruining the peace of the world, and fight to the death in ferocious war! In order to deal with a stronger threat, the game includes more than 140 types of different weapons, which are more powerful and destructive than ever. They include the rapid-firing Assault Rifle, long-range Sniper Rifle, destructive thrown Grenade, enemy-chasing Rocket Launcher etc. And the various pilotable weapon platforms in the predecessor are all retained, like the defensive moving fortress Tank, destructive bombing machine Combat Helicopter, and the highly mobile attack weapon Airbike. The player can coordinate the use of the various weapons and weapon platforms to give rise to varied battle tactics!