Another great game is free on Humble Bundle. This time, you can get Spec Ops: The Line and keep it forever in your Steam library. Just like always, the only thing you should do is to go to the Humble Bundle website, create an account, or use an existing one. After logging in, you should click on Add to Cart button, then checkout. You will receive an e-mail containing your Steam key. Also, you can preview the e-mail on Humble Bundle after your purchase.
For those who are more interested in a trailer than my useless words, here is a video:
Enjoy your free game fellas and stay tuned for more!