It’s that time of week again – a new Lego: The Lord of the Rings behind-the-scenes trailer has been released. This installment shows us fresh footage of Moria, Helm’s Deep and the Shire.

In this third developer diary (thanks again, IGN!) , named “Journeying Forward”, TT games talk about how they design the Lego models for characters and in-game props. There’s also a quick mention of the inventory system, and how new items provide different (and occasionally transferable) abilities for your characters. Also discussed is co-op play, where players can work together to navigate around obstacles and solve puzzles, unlocking new characters, items and quests as rewards.

This developer diary follows two previous installments that covered the addition of movie dialogue to Lego video games, and the scope of Lego: The Lord of the Rings.

As an aside, the ESRB rating of 10+ that previously only warned of cartoon violence now also promises “comic mischief”. We’re rubbing our hands with glee just thinking about it.

Lego: The Lord of the Rings will launch on PC, Xbox 360, PlayStation 3 and the Nintendo Wii and 3DS on October 30.

Which of Middle-Earth’s environments are you most excited about visiting in its Lego form? Will you be playing Lego: The Lord of the Rings on its release?