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Microsoft announced today that it has sold more than 17.7 million Xbox 360 consoles worldwide to date. Furthermore, the software giant announced that it has sold more than 8.1 million copies of Halo 3 since its launch September 25, 2007 while Mass Effect reached 1.6 million units sold in just six weeks since it went on sale!

Microsoft also reminded that Xbox 360 owners spend more on software and accessories than the other platforms, with the Xbox platform enjoying a record-high software attach rate of 6.9, according to November NPD data