The Mavs has announcing Guitar Hero Challenge, an event presented by GameStop and Activision which will take place at AT&T Plaza on March 20th through April 10th. Video game aficionados will have the chance to show off their skills and sign up to play under tournament conditions on the AT&T Plaza outside the South Entrance of American Airlines Center. All six finalists will receive two tickets to the April 16th game versus New Orleans and will receive a $100 GameStop giftcard. Check full story for details.