3D Realms may sadly be no more, but the Duke Nukem Forever pre-alpha assets continue to flow out of the former studio.
The latest is this three minute video, featuring not only Maya animation clips, but actual in-game gameplay footage of the title. The video comes courtesy of former 3D Modeler Bryan Brewer, who has updated his online portfolio in hopes of locating new employment. The video highlights the various completed character animations and assorted in-game environments, not to mention an insane arsenal of weapons and absurdly large-scale boss battles.
Please be aware, the video should be considered "not work safe" for language and nudity.