This video shows parts of the first stage finished to roughly 90%. The final stage has more lenght and the boss enemy will have more attacks.
Download: dux_stage1_teaser.avi (29,1MB/H.264)
Overall there will be 6 stages and I will explain each stage when time is given. Just for now you will encounter a space port, an water filled cave, a mine facility, a hyper space zone, an atomicly radiated den and last but not least the hideout of the terror itself.
Additional videos of DUX to follow when more stages are ready.
Source: HUCAST blog