Game contents will be under creative common.
3d engine and blender are under gpl.
What will be the licence of the source code ?
It's open source, ok.
and free ?
Will we see this game in linux distributions ?
The CS engine is actually under the LGPL.
The game code will be open source and free, and there will be a linux, mac os x, and windows version according to Jorrit (the Crystal Space project lead).