Tecmo Super Bowl is an American football video game for the Nintendo Entertainment System (NES) that was released in December 1991. Developed by Tecmo, it is the first sports video game that was licensed by both the National Football League and the National Football League Players Association, thus allowing the game to use both the names and attributes of real NFL teams and real NFL players. Prior games use either the real teams, the real players, or fictional substitutes, but not real teams and real players together. With Tecmo Bowl for NES in 1989, Tecmo had procured an official license from the National Football League Players Association, providing twelve teams and a truncated roster. The full NFL team license was unavailable because of the exclusive license held for another NES game, NFL. In the previous Tecmo Bowl for NES, each team has a roster of at least twenty players (twenty-one if the kick returner is not a starter), with nine players for offense, nine players for defense, a kicker, and a punter. In Tecmo Super Bowl, each roster has thirty different players. Each team has eleven defensive players who can be neither substituted nor injured. Each team has seventeen offensive players, which includes eleven starters and six substitutes. Eleven players are always on the field for each team.