Steampunk themed multiplayer first-person shooter Guns of Icarus Alliance is free for a limited time through the Humble Store. The game normally costs 11.99 euro but for the next 48 hours you can get it for free.
To get the game, just go to the Guns of Icarus Alliance page on the Humble Store, and click "Add to cart" then "Checkout". After that click "Get it for free." Once you get the game, it will be yours forever. The offer ends on Saturday, July 28 at 10 a.m. PT. But be careful, because the keys cannot be redeemed after August 11.