Lord of the Rings: Collectable Card Game (CCG) (Card Game)
Published by Decipher.
Two Player game (on-line game is also available)
There are several editions to this game, at least two sets of cards per movie (assuming that for the Return of the King, as that movie at this time has not come out).
This is an excellent game, but you have to like this kind of game (similar to all the other CCGs made popular by Magic: The Gathering).
More on this game later.