Engage in intense off world combat in an attempt to free Earth from tyranny.
The objective for each level is to plant seven explosive charges at strategic points in the level. These points are marked by purple circles on the map. Press 4 on the keyboard or joystick to plant the charge. When the first charge is planted it will begin a 10 minute countdown. Plant all the charges and get back to the ship before that time. In the top right corner is a compass.
The green dot represents the ship and the red dot is the center of your target area. The red and blue lines at the top center of the screen are the player health and armor. Returning to the ship replenishes ammo and armor.