Alan Wake is currently available to play as a backward compatible game. If you never played it, I suggest you change that. If you’ve played it but never tackled the DLC, now is a very good time to give it a look.
The two DLC chapters, The Signal and The Writer, are both free to download. It’s not clear if this is a permanent price reduction or a limited offer, so best not to wait too long.
The DLC adds new gameplay mechanics and wraps up Alan’s story, at least for the time being. I’m not always sold on DLC’s narrative value, but I think in this case both additional chapters enhance the story.
You can grab the free DLC here and read our review of the original game for more info. The game itself is still priced at $19.99.