An expansion for JK2 that is solid, but also gives you a better insight into Star Wars universe.

User Rating: 7.5 | Star Wars Jedi Knight: Mysteries of the Sith PC
This expansion is not so different over the JK2, but still it introduces some new features - like new weaponry, creatures and enemies, force powers, levels and missions. Overall, gameplay has not changed so much over the previous game, althought there is a little different control system for force powers.
I think that the most interesting thing here is the fact that you will fight your way trought the Sith temple and catacombs and that you will also play as Mara Jade, the former Emperor`s assasin and now a Jedi. As with the JK, you will also have the opprotunity to search for secret areas and will also have to solve various puzzles in the game - such as finding key for doors, using force powers to undercover buttons,...
Graphics have not significally improved, effects are little better. Sounds are more interessting, especially enemies and creatures ones.
I think, that hardcore FPS players won`t be so much impressed with this game, like they were with the last one, th JK2, expect Star Wars fans. Still I think that this is a nice addition to JK series.