RADARGRID
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from Sinclair Programs September 1983

DEEP IN SPACE your radar screen detects an alien attack.  To destroy an alien you must pinpoint
its position on the grid by pressing the letter and then the number of the grid square in
which it is situated.  If you miss 10 aliens your ship is destroyed and the game ends.

Radargrid was written for the 48K Spectrum by Bill Lythgoe of Shevington, Wigan.  The length of
time for which each alien remains on the screen is governed by line 240.  Change the 10 to a
smaller number for a faster-moving game.