Duke Nukem Forever is the upcoming First Person Shooter (FPS) from 3D Realms. It is part four in a series of PC games featuring Duke Nukem as the hero. Parts one (Duke Nukem) and two (Duke Nukem 2) were sidescrollers / platform games, and part three, Duke Nukem 3D, was an FPS. Duke Nukem 3D became one of the top selling games of all time and is a very important part of FPS gaming history; it is one of the few "legendary" titles together with Quake and Doom. There have also been console versions of Duke Nukem games, as well as the recently released 3D-platform game, Duke Nukem: Manhattan Project; but these are not direct sequels to Duke Nukem 3D.