Planet Smashers (Atari 7800)

It's an Alien ambush from a far out galaxy. Alien Planet Smashers are coming to obliterate Planet Earth. You must suit up and head off the invasion. Your starship is equipped with capable blasters, but you can earn mega weapons with devastating firepower.
The Alien Motherships are the ultimate challenge with colorful full screen graphics and awesome sound effects. Blast off and blast away -- it's only the fate of the Planet at stake.