The game is a follow-up to Lego The Lord of the Rings based on the first two Hobbit films; An Unexpected Journey and The Desolation of Smaug.

Much like its predecessors, the game presents storylines from The Hobbit films: An Unexpected Journey and Desolation of Smaug.

However, the developers modified the storylines to fit the events into a number of game chapters per film, as well as adding the humour the series has become known for.

Additional voices were provided by Tim Bentinck, Liz May Brice, Clare Corbett, Duncan Duff, Daniel Fine, Joel Fry, Jenny Galloway, Andy Gathergood, Anna Koval, Jonathan Kydd, Steve Kynman, Jamie Lee, Andy Linden, Sara Beck Mather, James Naylor, Emma Pierson, Jason Pitt, Richard Ridings, Emma Tate, and Marcia Warren.

Christopher Lee, who played Saruman in the film series, has an uncredited role as the game's narrator.