Description from the base game's main page:
Lord of the Rings is a co-operative game where the object is to destroy the Ring while surviving the corrupting influence of Sauron. Each player plays one of the Hobbits in the fellowship, each of which has a unique power. The game is played on a number of boards: the Master board indicates both the physical progress of the fellowship across Middle Earth and the corrupting influence of Sauron on the hobbits, and a number of scenario boards which detail the events and adventures of particular locations. Progression across the boards is determined by playing cards (many of which represent the characters and items of Middle Earth), and the effects of corruption are represented by a special die. The game is lost if the ring-bearer is overcome by Sauron, or won if the ring is destroyed by throwing it into the volcanic fires of Mount Doom.
This family listing includes the base game as well as all three expansions.