In the late of 2050s, an alien force came from outer space attacked Earth without any signs. In order to defend the homeland, millions of soldiers and military bots sent to battlefield by the Earth Defense Force. The war lasts for 3 years, human recapture more and more cities with the help of technical advantages.
But the good news ends at one week ago, a new type of alien hatchling with the ability of infect mechanical has been found not far from Ground Zero. Then the nearby frontline bases have been attack by their own battle bots at the same time, and the world fall into panic once again.
Lieutenant Sophia, the only survivor in the mechanical plague from Base Serpent, grabbed her weapon and vowed revenge for her comrades, and for all mankind.

Features:
•Exploding every second, Intense combat and mass of enemies bring you the most exciting gaming experience.
•Forget those moving & attack button smashing scroll games, the full direction shooting & aiming assistant system will turn you on!
•Tons of weapons! Try to master them and marching to victory.
•Fluid animation optimized for retina displays.