Published in the book Games For Your BBC Micro by Virgin Books Ltd.
The book contains the following description:
The aim of this game is to destroy the space invaders who
appear above the runway you see in front of you. You are
controlling a galactic patrol ship which has left and right,
and up and down controls. As you move your controls
down, the horizon moves up, and vice-versa.
The runway in front of you shows where the target is
going to appear. You know it will be appearing about 600
metres above the runway. The crafty space invaders,
however, create bogus UFOs which appear all over the
screen — you have to get the real space invader.
On the screen you are given your x, y, and z
coordinates. Your y co-ordinate gives your height above
the ground in metres. Your x co-ordinate gives your
distance away from the centre of the runway in metres.
Your z co-ordinate tells you how far you've gone.
If it takes you 10,000 metres (10 km) to destroy the
alien, you will be blown up by the invisible mines it lays;
because you are travelling at about 100 metres per
second, it means you’ve got just over 1½ minutes to
destroy the alien. Your controls are ‘Y’ to go up, ‘B’ to
godown, ‘Z’ to go left and ‘X’ to go right. To fire, you press
the space bar.
The problem is that at the high speed you are travelling
your velocity from left to fight and up and down is continually
changing because of wind resistance. You must
surmount these difficulties by deft use of your controls.
|Primary genre||Space Shooter|
|Compatibility||A:✘ B:✔ Master: Untested|
|Compilation||Games For Your BBC Micro (BOOK)|