Plague Inc.

A deadly disease spreading across the world is a terrible prospect, but it can also be the foundations of a rather interesting game. The developers from Ndemic Creations made a strategy title that covers this particular scenario.
 
The game aims to cover everything starting with the inception of the diseases, through its course, and its inevitable conclusion. But the game is more than just watching things unfold, while you’re powerless to do anything.
 
In Plague Inc., viruses and other diseases have hundreds of traits to evolve and thousands of world events to adapt to, and new updates are being offered all the time in the form of new mind controlling Neurax Worm or the zombie producing Necroa Virus.