Goodness gracious! The asteroids are falling out of the sky! You must protect the planet from all of the falling rocks! Use your mouse to aim and 'a', 's' & 'd' to fire. Try to plan ahead so the missiles blow up when the asteroids are near by.
Asteroid Command Instructions: Protect the cities from the falling asteriods. Use your mouse to aim, and use the keys A, S, and D to fire missles from your three bases. Hitting an asteroid high up in the atmosphere may cause it to break into two pieces during the explosion. Good luck!