The aim is to rescue men stranded on the planet surface and transport them
to the mothership somewhere in orbit above.
To do this you are equipped with a Rescue Rover which, using gravity
and booster rockets, can be steered to the various launch pads on the
planet surface.
On landing, one of the stranded men runs frantically to the Rover
and disappears inside.
Unfortunately, the asteroids through which the Rover first travelled
now turn into alien space ships. These then drop bombs in an attempt to
prevent your safe return.
Failing to dock with the mothership causes the rescued man to fall back
on to the planet to his death, with a suitable wailing sound.
As you can see, this is a game with a clearly thought-out story and
is all the more impressive for this clarity.
The controls are very responsive and make the game fast and furious.
It is a pity however that there are no "bonus screens" or real
changes of visuals, the diet being just another, more difficult sheet
to complete.