Alan Wake's essential post-credits DLC is now free on Xbox One and 360

If you played all the way through Remedy's Alan Wake , you know it has one of the biggest twist endings in video games. But if you stopped once you reached the credits, you've missed out on some pretty big revelations that occur in the game's duo of DLC epilogues, dubbed "The Signal" and "The Writer." Well, now's the perfect time to revisit the story-within-a-story thriller, since both The Signal and