Sorry didn't realize that was an old article here's more numbers: According to Microsoft, the Gears of War series has sold over 22 million units and earned over $1 billion (USD) in revenue as of January 2014. The Uncharted series trilogy has sold over 21 million copies worldwide as of June 2015. The Halo games have sold over 65 million copies worldwide, with the games alone grossing almost $3.4 billion.