Running Linux Mint 14. I have purchased the game on Desura. Trying to launch the game gives the following error.

...
MovableObjectFactory for type 'BillboardChain' registered.
MovableObjectFactory for type 'RibbonTrail' registered.
*-*-* OGRE Initialising
*-*-* Version 1.7.2 (Cthugha)
: initializing graphics
: loading plugins
Loading library lib/RenderSystem_GL.so
Installing plugin: GL RenderSystem
OpenGL Rendering Subsystem created.
Plugin successfully installed
Loading library lib/Plugin_CgProgramManager.so
An exception has occurred!
OGRE EXCEPTION(7:InternalErrorException): Could not load dynamic library lib/Plugin_CgProgramManager.so. System Error: libCg.so: cannot open shared object file: No such file or directory in DynLib::load at /build/buildd/ogre-1.7.2/OgreMain/src/OgreDynLib.cpp (line 91)

Looks like libCg is missing.

If your Mint is 64-bit, you need to go apt-get install nvidia-cg-toolkit:i386.

I'll experiment with bundling the cg toolkit in RWR 0.85, would seem like it's ok to bundle the toolkit too.