Wal-Mart Stores Inc. this week began holding a new Buy 2 Get 1 Free game sale for Microsoft Corp.’s Xbox 360 in a new online sales initiative. This week, customers who purchase two select game titles will receive a bonus title at no additional cost. Eligible titles include Alpha Protocol, Soulcalibur IV, EA Sports MMA, Lost Planet 2, Duke Nukem Forever, Crackdown 2, and Grand Theft Auto IV.