6 net levels: Courtyards, Decaffeinated, I'm Not Afraid of the Spotlight, King of the Damn Hill, Pfharade and Subterranean Heaven. The first one crashed my machine at least 3 times. The incredible amount of objects and sprites on this level was almost ridiculous. If you download this to test it---turn the aliens off, by all means!!!!!! Aliens were in the air, water, walls, rechargers just about everywhere. Two courtyards here that are linked by some passages.....some good construction ideas. Decaffeinated is a Pfhor type texture level. Again some pretty cool ideas. Spotlight was better IMO...