Enemy forces will try to break through your defence. Hold your position as long as possible. The more enemies and choppers you shoot, the longer you will hold the invasion. If the enemy is too close blow up the minefield. Call the air strike if you think you are lost, it will end the game, but will give you 20 bonus points, and you will still be a hero. Use the left mouse button to shoot. Press the left key for machine gun, right key for bazooka, down key for minefield and up key for air strike.