Great game ! P.S. - The best way to kill all of man kind is to start as a parasite. That is the silent type. Sell all simptoms of your parasite, then wait until you infected EVERY human on Earth ( you should buy everything else but simptoms, thought ). And THEN start buyng simptoms. That is how I KILLED EM ALL !!! MUAHAHAHAHA !!! Lol, anyway 5/5.