Those alien invaders are at it again! This time
descending one by one to the Landscape below. You can blast off and
destroy them but you have only limited missiles and fuel.
Use a joystick in port 1 to control your ship so that
it is below an alien and press the trigger to fire. Avoid contact with
the aliens and the landscape at all times as this is lethal. You will
also lose lives if you allow five aliens to land or if your fuel runs
out, but you can re-fuel by shooting the diamond shaped fuel store which
appears occasionally. This will also replenish your missiles.
Once all the aliens have been destroyed you must return quickly to
base to prepare for the next level.