When the industry stat-trackers at NPD Group released their December sales figures last week, Microsoft"s Xbox 360 exclusive Halo 3 was proclaimed the software sales king for 2007 in the US with 4.82 million units sold. That tally edged out Wii-exclusive Wii Play"s 4.12 million units and the Xbox 360 version of Activision"s Call of Duty 4: Modern Warfare, which sold 3.04 million copies. However, while Halo 3 may have won the fight in the US, it did not win the war for 2007.Activision today claims Call of Duty 4 has ended its 2007 tour of duty with 7 million confirmed units sold worldwide, making it the top-selling title across all platforms for the year. Activision said it had pulled its data from NPD Group, Chart Track, and GfK Group.