“All play has its rules.” —Johan Huizinga, Homo Ludens: A Study of the Play Element in Culture (1950) The first time I encounter the Wargamer, he is militantly editing a Word document and downing an Americano. Hundreds of red marks, crisscrosses, and deleted commas fill his MacBook screen. I make a small quip about how his desktop looks like a battlefield, and the Wargamer hastily explains that the color isn’t his fault, but rather, a courtesy of Microsoft Office. He tells me that he edits game rulebooks professionally, that he’s worked on games about pirates, migraines, and cats. I begin…