Of the eight “Playroom Rules” my mother kept tacked up for my siblings and me in our childhood home, one in particular always stood out: “In Animal Crossing: City Folk, no one may send Jack meaningless mail.” Beyond showcasing the unique brand of sibling rivalry my brother had to endure at the hands of two older sisters (which, apparently, included maxing out his Animal Crossing™: City Folk mailbox to the point he couldn’t receive mail from hisin-game neighbors), it’s a good indicator of the...