Duke Nukem Forever is a first-person shooter that has been in development since 1997 by the software developer 3D Realms. It is intended to be a sequel to the 1996 game Duke Nukem 3D, as part of the long-running Duke Nukem video game series. The game's development was directed by George Broussard, one of the creators of the original Duke Nukem game. Intended to be groundbreaking, it became infamous for its severely-protracted development schedule. The game has been the subject of much speculation, and has frequently been referred to as vaporware.