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2. Call of Duty: Modern Warfare 3

"Modern Warfare 2" and "Black Ops" — the previous two installments in this blockbuster series — set sales records. The latest installment started strong, but tapered off after the holiday rush. And while no publisher would be upset with the year's second best-selling game under its belt, Activision-Blizzard is likely a bit frustrated that the latest installment of its most important franchise hasn't held up as well as its predecessors. That said, judging by pre-orders, "Black Ops II," the next "Call of Duty" game, is well positioned perhaps to take the crown for 2012's top-selling title.

Photo: Activision-Blizzard