The Two Towers is a hack and slash action game played from a third-person perspective. The game features levels taken either directly from scenes in The Fellowship of the Ring and The Two Towers films, or based closely on elements from the films. For example, the levels during the defense of Helm's Deep are very similar to the corresponding scenes in the film, but a level in Fangorn Forest in which the player fights orcs, Uruk-hai and trolls is original to the game. For most of the game, the player is free to play as Aragorn, Gimli or Legolas. In the game's main opening level, however, set at Weathertop, only Aragorn is playable. Isildur is also a playable character in a tutorial level set during the Battle of the Last Alliance. All subsequent levels can be played with any of the three characters. Often, the two characters not chosen as the player character will appear as supporting NPCs. Upon completing the game with all three characters, the player can play through every level with Isildur.

(Taken from https://en.wikipedia.org/wiki/The_Lord_of_the_Rings:_The_Two_Towers_(video_game))