Duke Nukem 3D

Duke Nukem 3D is a first person shooter developed by 3D Realms[?] and released in 1994 by Apogee, featuring the adventures of Duke Nukem, loosely based on a character that had appeared in earlier platform games by the company, "Duke Nukem" and "Duke Nukem 2".

The game was mainly notable for the (often crude) humor it introduced into what had previously been a fairly humorless genre, including a stream of one-liners from the title character. For instance, when the player comes upon a corpse that closely resembles the player character in Doom, Duke comments "That's one doomed space marine."

The game freely plundered many themes, such as the Alien film series and the film Army of Darkness.

The source code to Duke Nukem 3D executable was released under the GPL in April 2003. However, the game content still remains the sole property of 3D Realms.

A long-promised sequel, Duke Nukem Forever, is still in production after several years of development.