New Duke Nukem Forever DLC features single-player campaign; coming Dec. 13

Gearbox has revealed new downloadable content for Duke Nukem Forever, adding a new single-player campaign to the game along with a handful of multiplayer maps. The content is set to launch on December 13 on all platforms. 'The Doctor Who Cloned Me' will bring Duke "deep in the heart of Area-51" where Dr. Proton has been hatching a new, evil plan. Duke will have to contend with "evil clones, aliens queens and anything else that comes his way" in order to save the world. The announcement promises new achievements, weapons, enemies, and bosses.

'The Doctor Who Cloned Me' includes new enemies and weapons

According to a page on the official Duke Nukem site, the upcoming downloadable content also adds four fresh multiplayer maps to Duke Nukem Forever:
Sky High: The alien-infested corporate offices of Pooty, Inc. near the center of Las Vegas. This map includes three indoor floors taken over by the aliens and two rooftops, jump pads, stairwells, and building-to-building combat.
    Command: EDF command center with an imprisoned BattleLord at its core! A two-level map featuring winding stairs, straightaway corridors, and jump pads.
      Drop Zone: Rooftop of Duke’s Lady Killer Casino featuring indoor and outdoor combat and stairwells for platforming, an EDF dropship on landing pad, and a bottomless pit.
        Biohazard: Fight in the Breston Plant Nuclear Power facilities and compete across multiple floors in locker rooms, restrooms with showers, control rooms, and the nuclear waste storage room.
        Duke Nukem Forever 'The Doctor Who Cloned Me' will be available on December 13 for the PC, PlayStation 3 and Xbox 360 for $9.99 (800MS Points).