SILENT ASSAULT NINTENDO NES

A deadly alien force has taken over all military forces on Earth. For some reason, the alien power is unable to control you, leaving you as the only one who can fight back. To be victorious, you will have to fight both military forces and alien creatures in a variety of different landscapes. Along the way, different weapons can be found to aid you in your onslaught, along with temporary invincibility and energy regeneration bonuses after destroying certain enemies. There are eight different worlds with many deadly enemies to defeat.