Three years after the Evolution Conflict, the Unknowns return with a large invasion. Fortunately, the Earth is already in vigilance after that conflict. With the new department called "Earth Defense Organization" formed, the research power all over the world was combined together. Now, the newly developed fighters and its highly-customizable weaponry are packed. Make your choice and strike back the Unknowns! Features One game system features strategies and the another one features excitements. Combining different systems together with variant difficulties, there are in total 5 different game modes satisfying different demands. There are 10 different fighters for choosing, and each fighter has independent customizations. Customize it with your interest and makes it your own choice! A well-adjusted resource system, in which the total resource is limited, but with slow health regen and the protection of auto bombs, the fault tolerance is relatively higher.