I have both the Two Towers and Return of the King. I can honestly say, that while their systems are similar, Return of the King plays much better and looks much better. Plus with the added Co-Op mode, it just seems to be a worthy succesor to the Two Towers. However, I must admit that I haven't played much of the Return of the King, because I'm afraid of ruining the story for myself. If you haven't read the book, I'd reccomended waiting to play it. I know I am going to, but it's very very HARD.