Orbital War

You are the commander of the Starship Enterprise. Your job is to defend Earth from incoming hostiles from space. Shoot them down before they reach your territory.

In Orbital War one player controls a spaceship at the top of the screen in real time, moving left and right and shooting at alien craft with your energy beam. They pop up on the bottom of the screen in random spots and intervals and soar their way upwards. Successfully hitting one will add to your score, while any alien that will make it beyond your line of defense unharmed will count as a miss.

There are 50 aliens of several different types (Cosmetic differences only) on each session and your score is based upon the hit/miss ratio. There's no way to lose, instead you are presented with your score and are prompted to start a new session. The difficulty level is adjustable, affecting how fast the game will run.