The NBA 2K series is a series of basketball video games developed and released annually since 1999. The NBA 2K series was exclusive to the Sega Dreamcast when it was first introduced by Sega to address EA Sports's decision to not publish any sports games. The series was originally published by Sega, under the label Sega Sports and is now published by 2K Sports. All of the games in the franchise have been developed by Visual Concepts. Its primary competitor in the marketplace is the NBA Live series from EA Sports.