70 million Xbox 360 consoles had been sold as of September 30, 2012, according to Microsoft.
In comparison, lifetime PS3 sales stood at 63.9 million units as of March 31, 2012, while lifetime Wii sales stood at 96.56 million units as of June 30.
Xbox 360 launched in November 2005, and Wii and PS3 in November 2006.
Last night Microsoft reported a year-on-year decline in Xbox 360 revenues and shipped units for the first quarter of its fiscal year 2013.
And earlier this week the firm's UK arm poured cold water on speculation that it will introduce an Xbox 360 price cut in the run up to the Christmas shopping season.