The PlayStation 4 sales reached six million units worldwide on March 2nd, Sony has said. The console launched in Japan at the end of last month, following release in North America and Europe in November. The PS4 is now available in 57 countries worldwide. Beyond this Sony has also said that software sales for the platform stood at 13.7 million units worldwide as of March 2nd. This number includes both packaged and digital game sales. Killzone: Shadow Fall has sold 2.1 million units while Knack has performed strongly thanks to bundle deals. Source - PSTrophies