2007 was indeed a great year for the gaming industry. Guess who made the big bucks. The first person shooter Call of Duty 4 was the biggest selling game in 2007. It's publisher Activision claims, it has sold over 7 million copies since its launch in November 2007. Among other high profile releases, Halo3 the third installment of the Halo series earned more than 170 million in sales in the first 24 hours of release, according to Microsoft. This breaks the record set by Spiderman3 movie for the most money earned in a day by an entertainment product. But wait, though Halo 3 made a record sale in the first day, Call of Duty 4 took over by selling more units and guess what. It even took over Halo 3 as the most popular game on Xbox live based on unique users. Fore more info check out the news article on BBC here. Meanwhile check out the trailer after the jump.