Brutal...with a story!
Even if you aren't a fan of the comics, I would still recommend giving this game a try. The Darkness powers are fun to use (especially Creeping Dark, which is a snake thing that you can use to remotely attack your enemies), even if the gunplay is pretty vanilla. The game begins with an awesome car chase that ends specatacularly. Needless to say you then proceed to shoot a bunch of people. Not long after, you gain the powers of the Darkness, and you can let your inner demon out. Killing people in various and brutal manners is pretty darn fun.