Humanity, fight against fate.
Now begins the ultimate battle between huge aliens and the EDF.
The world's very existence is at stake with this war.
A case was taking place in the base 228 of EDF.
Deep underground, the huge facility was invaded, and people were attacked by unknown monsters.
At the same time, a gigantic mothership flew around the world and began attacking without discrimination.
So it is that you, the player of this game, will become one of the private citizens who was accidentially inside base 228.
You will bravely take up arms during this crisis, joining the intense fight against the aliens without realizing that you will become the soldier who will eventually control the fate of Earth...