Activision and Best Buy are calling for gamers for the retailer's Call of Duty 2 Xbox 360 online gaming tournament. Through June 16, gamers can enlist at Best Buy's gaming tournament Web site for the chance to win the grand prize--a 2006 Jeep Wrangler. The tournament will be facilitated by the Global Gaming League and will take place from June 21-July 23. Contestants must be 18 years of age or older and be Xbox Live Gold subscribers to enter. The single-elimination tournament will feature more than 500 gamers in teams of four in the game's multiplayer mode. Other prizes include Best Buy gift cards and Call of Duty 2 T-shirts and Xbox 360 faceplates.