Mysteries of the Sith is the add-on mission disc for Jedi Knight. But it is not only a bunch of new missions, it's almost a complete new game! It contains 14 new levels, one new player character, 4 new weapons, 5 new force powers, more enemies and multiplayer enhancements. A great new feature is the improved 3D graphics engine, which now is able to display coloured light via 3D acceleration. The music is still the same original Star Wars soundtrack.