Viper

Viper is a 3D helicopter blaster on rails, you take control of one of three choppers and proceed to wade your way through waves of enemies in an effort to free the earth from alien forces attempting to take over.

Every governmental power on Earth is slowly being infiltrated. Control is being diverted. Alien forces are conquering the planet, gradually eradicating humanity, and we haven't yet realized. Only one person know the truth and only you an save humanity. You are Viper, a crusader armed with a state of the art attack helicopter