On Black Friday, my husband and I purchased a second Xbox One. We weren’t initially going to do that, but we had reached a tipping point between the cost analysis (it’s expensive and we’re just two people) versus the games that we wanted to play together, namely Halo 5 and, in 2016, the new Crackdown. Our discussions were long. We ended up making lists of games that could be played co-op and on...