Destiny. Following up with Activision, we've had this figure clarified as "PSN IDs and Xbox Live Gamertags that have jumped on and played Destiny."
And those 13 million have created 22,932,276 Guardians, who have then spent 872,404,449 hours in-game, with 3,141,592,653 curses tossed at Master Rahool the Cryptarch. Okay, we made that last statistic up. Because, frankly, the hatred for the Cryptarch isn't quantifiable.