The Humble Bundle store, popular for its low-priced and charity-based game bundles, is currently running a giveaway event for the PC and Mac versions of LEGO: The Hobbit, which you can claim to redeem on Steam before Dec. 15 at 10am Pacific time. Here is everything you need to know.

About LEGO: The Hobbit

LEGO: The Hobbit (2014) is a single-player and shared screen coop Lego-themed action-adventure video game developed by Traveller’s Tales, and is a follow-up to Lego The Lord of the Rings.
Reclaim the Lost Kingdom brick by brick. Join Bilbo Baggins, Gandalf, Thorin and his company of Dwarves in an epic adventure across Middle-earth to recapture the Lonely Mountain in the most expansive LEGO game to date.
• Battle ravenous Trolls, dangerous Orcs and many more!
• Combine the Dwarves’ unique abilities to solve puzzles – often with hilarious results!
• Explore iconic locations in Middle-earth, from the Shire to Goblin-town and beyond.

How to unlock LEGO: The Hobbit

All you need to do is to go to the Humble Bundle’s page to claim the key by pressing the big green “Get the Game” button. Then follow the instructions (such as creating an HB account if you don’t have one, and linking a Steam account), to get the key sent to your email address. Then, head over to Steam in order to redeem your key*.

Note that claiming the game also implies that you subscribe to HB’s newsletter (box ticked by default). This promotion is available from Thursday, December 15 at 10 a.m. Pacific time to Sunday, December 15 at 10 a.m. Pacific time.

*Need more directions? Here is the full instructions page from the Humble Bundle store on Redeeming Your Game Keys on Steam.