Totally RAD

Extra Lives:
Position yourself in front of the first green solder that appears, Kill him and his replacements when they appear, you may have to move backwards and forwards to make the replacements appear if you are not in the correct position.  Extra lives will be awarded for :-
50 Kills, 100 Kills, 200 Kills, 300 Kills, 400 Kills,
500 Kills, 600 Kills, 700 Kills, 800 Kills, 900 Kills,
1000 Kills, A Maximum 13 Lives may be collected.