XD i used to play that all the time i never fail lol...... u gotta get good turrets thats all u need then get to space age and save up for 2 supersolgiers by usings turrets to kill anything they throw
get 3 really good turrets then just kick back and wait for $300,000 make 2 super solgiers and the games urs
muahahahahahahahahahahha ever the strategist arent i? lol