From a PC gamer:
In 2012, there were 32 million units of software sold globally for PC, and there was only one PC game in the top 30 – Diablo III– which came in at number 14. By comparison, the combined PS3, Xbox 360, and Wii software sales topped 331 million
Read more:
http://www.digitaltrends.com/gaming/...#ixzz2qzmcMXd5