How could I miss this thread?
This is absolute impressing.
Although a few effects, like the shadow of the building outside, don't work on my crappy ATI Radeon X300- frown

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt