Retailer Amazon.com this week began offering a 'Buy 2 Get 1 Free' game deal in a new video game promotion.

In the new offer, customers who purchase two eligible Wii titles will receive a third at no additional cost.

Titles include Guitar Hero: World Tour, Call of Duty: World at War, 007: Quantum of Solace, Guitar Hero III: Legends of Rock, and Dancing with the Stars.

NPD Group Inc. in Dec. reported that the Wii sold two million units to rank as the top-selling hardware in Nov. U.S. sales.

Nintendo in Oct. released Wii Music, a new casual title that allows players to improvise more than 60 instruments.

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