I have played the second and third game....they are quite good and immersive
They are similar in structure to the Knights of the Old Republic games of 10-15 years ago.....in terms that you have one central playable character but you can make a team of three from about 10 different characters. And the game hinges on what your responses are in terms of conversations - the whole are you good or evil dynamic.
Invariably I always choose evil it's far more fun. But yeah in my opinion anyway it's worth playing.