Crystal Space is an Open Source and very portable 3D Game Development Kit. This talk goes in depth about two very important systems inside the Crystal Space Framework. SCF is a portable system that enables Crystal Space to have plugin support on all platforms. Using SCF enables Crystal Space developers to make the engine really modular and not have to worry about system details like how to load the dynamic module and so on. In addition SCF allows access to C++ classes without having the C++ name-mangling problem for modules compiled with different compilers. VFS is a file system on top of the real file system that hides the non-portable aspects of file systems and also allows transparent access to ZIP archives as if they were simple directories.