In the game you are fighting through all the waypoints of the journey of Frodo and Sam. The individual levels are connected by a large walk-through Middle-earth world. In the levels puzzles must be solved by searching, on combination, to action tasks. In each level, different characters are required to make it according to 100% complete, thus a very high replay value is given to also complete. In the vast overworld are (like GTA4) different extra tasks to do, what you get imposed by the inhabitants of Middle-earth. During the game different characters can be freely bought, which (as with all previous Lego games) have different abilities.
If you liked the previous Lego games, here immediately felt like "home". But a proper development is the great Middle-earth open world which freely accessible and full of secrets is peppered. Another development is the really very successful speech (partly the dialogues of the characters are 1: 1 from the book / movie taken).
Conclusion: Very good action adventure with charming setting. For Lego LOTR fans and a must!