Lately I’ve been playing Minecraft, the underground video game hit developed by Markus Persson, a bearded Swede who goes by the alias “Notch.” Persson developed the game in about a week before releasing it to the public, and Minecraft is currently in the midst of a popularity explosion unprecedented in the history of independently developed video games. A day in September saw sales of 25,000 within a single 24 hour period, and total sales have exceeded 300,000. I predict mainstream awareness (say, a New York Times feature) within 30 days.