It is definitely a brilliant game! A great RTS game, whether you are playing it by yourself or online.
The campaigns are based on the films, "The Lord of the Rings".
There are 4 civilisations: Mordor, Gondor, Rohan and Isengard. The graphics are very detailed and it has clear sounds, some of which have been taken from the film. There is a basic guide for starters and newbies of this game type. There are a few difficulties, Easy to Hard. The Map Maker is also a great and fun thing to do. Make your own maps and post them online or play Skirmish with them. It's really great fun!
This is a brilliant game which never gets boring! And if you are considering to buy it, I would suggest to do so!