Alien Planet is an arcade shooter game where you play as alien trying to defend your planet from the asteroids. Use the cannon to release cannon balls that will destroy the nasty asteroids that falls and they are powered by numbers. Numbers are displayed on the meteorite. When you hit the meteorite, the number counts down and when it reaches 0, the meteorite breaks. If the meteorite falls to the bottom and explodes, it will be a failed mission. Break the meteorite before it falls. Enjoy playing Alien Planet game here at Y8.com!