All informations are here, in this forum and in the links you see at the left.
You need hours or days simply to look at all those infos, tutorials, demos.
Start with the main page of GameStudio, look at the download site, the wiki, the magazine issues, the resource site...

No need to give it, its all already given! wink

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