The mankind has long dreamed of contacting another race. But what if aliens aren’t as friendly as we hope them to be? Perhaps they will try and conquer earth? You can’t let that happen! Stop the destruction of our planet and fend off a huge army of green men. Reply to the aggression from the outer space with your bravery and a rain of fire from your weapons. To win this war, it’s not enough to kill all the invaders in your sight. There are much more of them inside the UFOs hanging in the sky, ready to land and continue the assault. Bring all the spaceship down too!