First released in 1999 by Sega, NBA 2K focused on realism and minute details, raising the bar for sports simulation games.With 1.6 million daily active users as of June 2018, a pioneering professional eSports league based on the game, 40 million registered users in China for the free-to-play NBA 2K Online, and more than 130 million units sold in the series, NBA 2Khas become a global sports powerhouse.