Before it made Warframe, Digital Extremes made some awesome games such as The Darkness II, and if you haven't experienced it yet you can grab it online for free.
Continuing its tradition of awesomeness, the Humble Bundle Store is giving away free copies of 2K Games' brutal shooter The Darkness II...but be sure to act fast as copies are apparently limited on a first come first served basis. And what's more the game will only be free for the next 48 hours so jump on it ASAP.
I've yet to try the game myself but I've heard nothing but good things about the sequel and the series as a whole...so you better believe I grabbed my copy already.