If you're looking for something to play right now and you enjoy first-person shooter (FPS) games, you'll be happy to learn that one of the best single-player ones from the 2010s is currently free on Xbox consoles and Windows PC with an Amazon Prime membership. That game is Wolfenstein: The Old Blood, the 2015 prequel to 2014's The New Order that brought the beloved Wolfenstein series — one of the first and most influential shooter franchises — into the modern age. While it retails for $20 normally, it's available to play forever for free on Prime Gaming from now until...