Okay. So I was browsing TVtropes, and I found this awesome game.
http://www.crazymonkeygames.com/Pandemic-2.html
It's called Pandemic...2. (there's a first but it lacks challenge)
Your challenge is to infect all of the human race with a virus of your own, and kill them. Sounds easy, rite?
Well, it's not.
You start off as a simply virus. You have to upgrade your way to success. For you. Not humans.
It's a strategy game. You have to think your way.
If you make the virus too noticeable, the world will go nuts (i mean it) and close all your ways of infecting other countries. Of course, if you infected them all, then you can make it deathly as hell.
If it's too dangerous, then the government will try to make a cure. Once they finish it, you can't infect other people.
Anyways, yeah, have fun. There's also a Guide if you're confused about something.
(protip: madagascar's really hard to infect)

