Found the announcement that Cocos2d-x expands support to Windows 8 Metro:
I understand it is based on cocos2d-x1.0.1.
According to this:
there are some libxml2 issues, so it doesn’t work yet on Windows 8 RT.
Wondering do you have some time estimate when will Cocos2d-2.0-x-2.0.2 include Windows 8 RT support?