The Legend of Zelda: Twilight Princess

The Good
The huge open world to explore, the amazingly designed dungeons and puzzles, the story, the characters and the wolf transformation mechanics. It all works so well to create an amazingly enjoyable experience.

The Bad
The incredibly long and boring introduction/tutorial segments. These could have been toned down a lot and it would really help replay-ability!

The Bottom Line
An action-packed adventure game with a huge world to explore, intricately designed dungeons and puzzles and the ability to turn into a wolf and travel between worlds in order to stop your own world from being engulfed by the other.