All-Star Baseball 2003 is a sports simulation game for the Nintendo GameCube that lets players step onto the diamond and experience Major League Baseball action. Developed by Acclaim Studios Austin, it belongs to the genre of baseball games and offers an authentic representation of the sport with detailed player models and stadiums. The game features various modes including Exhibition, Season, and Franchise, with the latter allowing for team management over multiple seasons. Its intuitive controls, realistic MLB rosters, and commentary from Bob Brenly give fans an engaging virtual baseball experience.