First-person shooter where you take the role of a possessed Mafia member that that have to kill off more or less everyone he worked with before. Besides the normal guns you also have darkness power from the thing inside you. It is also possible to summon small deamons called Darklings to help you fight. The problem with the game is that the darkness power is really not that fun and the story is also somewhat dull. The only place when it lights up is when you kill yourself in the story and go to a horror style world war one setting that act as the private hell the darkness have you in you resurrect. Still, I'm not sure that 'it's fun when you kill yourself' is a good selling point for a game.