Frankly I don't understand all the hoopla over this. 1. The game will definately change before it goes gold 2. These 3 levels are very basic and just give a inside of what John and crew is up to.
3. Due to the incomplete code. I wouldn't waste anymore time on trying to play the alpha, because of poor performace and or bugs. (low frame rate playing on a machine that is a P4 1.7 w 768megs Gforce4 Ti4400)
It's just not worth the headache trying to make it run. I'll wait til spring...(last I heard its to be released)