Attack on Kixi

Computer scans of the sectors in the region of Kix-2 have detected fleets of alien destructor craft. These are of the Silicon-organic variety which can think for themselves. Every fleet is hostile and their intelligence is greater in the high order sectors...

The amount of aliens breaking off on a plasma bombing run is proportional to the sector number. Do not forget! You will be granted another base for every 10000 marks that you can earn. For more marks shoot the aliens, when they are nearest to ground level.