PORCast

The battle between Microsoft and Sony in the sci-fi sequel department, Microsoft's Xbox 360-exclusive "Gears of War 2" nudged Sony's PlayStation 3-exclusive "Resistance 2" by an aggregate review score of 94 percent to 87 percent, according to GameCritics.com.

Activision returned to World War II after taking a year off in 2007 to introduce "Call of Duty: Modern Warfare" and gamers were eager to experience the Pacific Theater of War in "Call of Duty: World at War."

The franchise has sold over 35 million units around the globe and remains a top draw on Xbox Live.