From the Steam page:
"Plague Inc: Evolved is a unique mix of high strategy and terrifyingly realistic simulation. Your pathogen has just infected 'Patient Zero' - now you must bring about the end of human history by evolving a deadly, global Plague whilst adapting against everything humanity can do to defend itself."
http://store.steampowered.com/app/246620/
I've played the free version on my tablet. It's a blast! Their new version is still in the works and they have an early access offer available. I highly recommend it.
Played it on iphone (where it is fully released), lots of fun. Although I will admit, if it was on PC I probably would have played something (anything) better.
With the exception of FTL, I don't think there is anything better than Plague at that price point.
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