GreenManGaming is giving away a a lot of Free Games, but whith a twist! You have to get the vouncher, and apply it at the checkout! So go and get one of the Keys right now!
Scroll down and click on the "Add to basket" button under the Commandos Collection picture.
Then get your voucher in the right column. This code will change the price to $0.
Go to checkout, and aplly the voucher you got! The price will go away, and you can get the game for Free!