Lead designer Jens Bergensten tweeted the sales milestone, and hinted that horses would be coming to the game in a future update. Bergensten linked to a "subtle" hint about the main feature in Minecraft 1.6, which was a picture of a horse.
Minecraft has also been a big success on the Xbox 360, with the Minecraft Xbox 360 Edition selling over 6 million copies since its release in spring 2012. Mojang has now said it will consider porting the game to PlayStation.