>>715407740I don't think it's as good as people say it is, but there are a few things that make the game noteworthy, like playing/seeing Anakin's attack on the temple or the alternate ending where he beats Obi-Wan.
If you haven't, read the ROTS novelization by Matthew Stover. It's extremely good and approved by Lucas. Your ROTS experience is not complete unless you have seen the movie, read the book, and played the game.