Duke was working for the EDF and received a call because the aliens are planning to build a HUGE weapon on earth and use it to destroy other planets and then, possibly the Earth. So there is no time to sleep, duke runs out to find them and stop these f*cking aliens!
Very solid episode of classic Duke3D action.
Sadly not perfect, gameplay is too shotgun oriented, some areas here and ther have dull lighting, and health-ratio is a bit tight. But that pretty much summarizes all the complaints I could have about this episode, so overall it's not much.
The thing I like the most about the episode is the architecture design which is very much to my liking.