Activision has announced that Call of Duty 4: Modern Warfare was the number one title in units worldwide for calendar 2007, this according to The NPD Group, Chart Track and The GFK Group.

Since its launch in November, the game has sold in excess of 7 million units worldwide.

Will Kassoy, senior vice president, global brand management, Activision: “We’re very excited about this achievement especially given so many competitive titles this year. Consumer and critics agree that Call of Duty 4: Modern Warfare is one of the best games ever created and further establishes Call of Duty as one of the premier brands in the industry. This ground-breaking game and franchise continue to establish new standards by which all other action games will be judged.”

This is the latest in a series of great news from Activision recently -  the company recently announced the that Guitar Hero franchise has brought in over a billion dollars and the company also became the number one publisher of 2007 in the US.