Planetoid

Your laser-ship is patrolling the surface of the planetoid. The scanner in the top section of the screeb shows the whole planet's surface, and can be used for long-range reconnaissance. The lower part of the screen displays the section over which the laser-ship is flying. The raiders can be seen hovering around the surface on the look-out for life-forms, which they can drag off into space. As a raider ascends with a life-form, you can destroy it with your lasers, or with the 'smart bombs' which disintegrate everything hostile within sight. Having annihilated the raider, you can intercept the plummetting life-form and set him safely back down on the surface. If you don't rescue a life-form before the raider carrying him reaches the top of the screen, the raider will mutate. You will then have to contend with a mutant, while also being attacked by bombers, spores and megacytes; all of which are to be avoided at all costs and killed before going on to the next wave. Cruisers are also dangerous, but don't have to be destroyed before you move on to the next wave.