Unless you're using it for "serious gaming" :)
http://techreport.com/news/30185/crytek-releases-cryengine-source-code-on-github (http://techreport.com/news/30185/crytek-releases-cryengine-source-code-on-github)
Quite a demo video though:
https://www.youtube.com/v/vF1zjDSqPoo
Very impressive capabilities. ;D 8)
Hawk.