(known as John Madden Football until 1994) is an American football video game series developed by EA Tiburon for EA Sports. It is named after Pro Football Hall of Fame coach and commentator John Madden, and it has sold more than 250 million copies. It is also the only officially licensed National Football League (NFL) video game series, and it has influenced many players and coaches of the physical sport. Among the series’ features are detailed playbooks and player statistics and voice commentary in the style of a real NFL television broadcast. As of 2013 the franchise has generated over $4 billion dollars in sales.