Plague Inc: Evolved [official site] is, at heart, ye olde Flash game Pandemic. Players design and evolve an infection to spread across humanity and, ultimately, wipe out all 7.4 billion of us blights upon the face of the Earth. Around that, though, Plague Inc adds all sorts of new and exciting ways to kill us vermin, mod support, competitive multiplayer and, now, co-op too. After two years in Early Access, Plague Inc: Evolved has reached version 1.0 and properly launched. Possibly ejected as a virulent sneeze on a crowded train. The game slrrrrpps down your cheek. You politely clear your threat and pretend not to notice, muttering about the Evening Standard’s Sudoku.
Usually, if a virus stops adapting, it's finished. Fittingly, Plague Inc: Evolved will receive its final Early Access update on February 18, wrapping up two years of development. To their credit, the devs have implemented each and every feature they pledged at the start of the project in addition to requests from players.
Evolution (update) 18, which will take Plague, Inc to version 1.0, will introduce co-op mode to Steam's premiere pandemic simulator, joining the head-to-head play added in December. You and a pal take charge of two different diseases and attempt to bring down civilisation in tandem. That feels a bit unfair on humanity, but I do have a vested interest in not being riddled with disease. Fine detail on the update can be found on Plague's Steam community page.
40,224,866,097,135,818 people have been infected by Plague, Inc players. Here's to many more.