I've been playing Plague Inc. Evolved on the PC. It's early access for $14. Pretty fun. I just killed the world, despite humanity's best efforts, with a virus named Unix. It originated in Canada, was initially very weak and accustomed to cold weather.
I made it easily transmitted via vermin and Unix spread like wild fire.
They totally should have cancelled those games, but the innocent often fall victim to unix, the greedy virus. Later, but not much, the last healthy person in the world contracted Unix. His name was Zero.
After that governments shut down and anarchy ensued. The world died. On to the fungus family.