While trying to ignore the really bad dialogue and the fact that he sounds like Batman with that raspy voice, this trailer paints a pretty good picture for Plague Inc. The game is currently available for iOS and has received quite a bit of hype as being a really good strategy/simulation game. You play as the virus/bacteria and your goal is to kill all humans by quickly infecting and spreading as fast as possible.
There are already games out like this, but Plague Inc. goes the extra mile by bringing a more in-depth story and better game graphics. It launches next week on October 4 for $0.99 in Google Play.