Duke Nukem Forever, often abbreviated as DNF or DN4E, is a first-person shooter (FPS) developed by 3D Realms and later by Gearbox Software released on June 10, 2011 in the United States. It is part of the Duke Nukem series. It follows the successful title that was Duke Nukem 3D.
Duke Nukem Forever is the most famous vaporware i.e. it is known for its long development. This started in January 1997, until May 6, 2009, when the 3D Realms studio was declared bankrupt; this bankruptcy was subsequently denied by the studio.
