Much more than just a game: World of Warcraft at 20

On 23 November, the video game World of Warcraft celebrates its 20th anniversary. That’s no small thing. By most metrics, it is the most successful video game of its type in history. At its peak, it had more than 12 million active subscribers, and in its two-decade-and-counting lifetime it has made more than three times as much money as the highest-grossing Hollywood movie of all time.