The debut gameplay video showcases the title's multiplayer combat and objectives, featuring battles between the likes of Gandalf and Sauron.
The multiplayer online battle game sees players attempt to conquer opposition fortresses, utilising the abilities and skills of their guardian characters.
It features 20 guardians from the popular fantasy franchise, including Gollum, Galadriel, Legolas and Gimli.
Announced at this year's E3 Gaming Expo, Guardians of Middle-earth is being developed by Monolith Productions, exclusively for consoles.
It is due to launch on Xbox Live Arcade and the PlayStation Network this autumn.
Monolith's previous titles include Gotham City Impostors and the first two games in the F.E.A.R. franchise.
The game releases ahead of The Hobbit: An Unexpected Journey, which will be released on December 14.
Picture gallery: view images from The Hobbit An Unexpected Journey below: