During it's latest financial earnings report, Activision Blizzard revealed that Diablo III has sold more then 20 million copies since the original release in 2012. This includes the expansion Diablo III: Reaper of Souls plus retail and digital sales for both the PC and console versions.
This number should increase in a few weeks, with the launch of Diablo III: The Ultimate Evil Edition, which brings the expansion and the game, all in one pack, to both generation of consoles. The report also announces that Blizzard has licensed the game to NetEase, who will distribute the game in China.