https://docs.unity3d.com/Documentation/Manual/windowsstore-gettingstarted.html says I can build to Windows 8.0 SDK from Windows 8. When I try to do it, Visual Studio 2013 says I need to update to Windows 8.1 to build the project. Any way to get around this ?
I would just say to upgrade to windows 8.1 that is what I did. It is free. And in my opion it is better than windows 8. SO you might want to anyways.