Mojang 2012, Mojang was co-developing a video game codenamed "Rex Kwon Do" alongside an undisclosed developer. Before the title had reached a significant stage of development, Mojang cancelled the collaboration, due to their lack of involvement and influence on the project. In March 2012, Persson revealed that he would be designing a space sandbox game. Although Mojang teased with an April Fools' Day website based around "Mars Effect" (citing the Bethesda lawsuit), it was confirmed that the game was indeed in development, albeit with a different name. On 4 April, Mojang revealed the game's title to be "0x10", set in the
Minecraft week of being on the Xbox Live Marketplace, "Minecraft" sold upwards of a million copies. GameSpot announced in December 2012 that "Minecraft" sold over 4.48 million copies since the game debuted on Xbox Live Arcade in May 2012. In 2012, "Minecraft" was the most purchased title on Xbox Live Arcade; it was also the fourth most played title on Xbox Live based on average unique users per day. , the Xbox 360 version has sold 12 million copies. In addition, "Minecraft: Pocket Edition" has reached a figure of 21 million in sales. The PlayStation 3 version sold one million copies