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
Markus Persson was released on 18 November 2011. Persson left his job as a game developer to work on "Minecraft" full-time until completion. In early 2011, Mojang AB sold the one millionth copy of the game, several months later their second, and several more their third. Mojang hired several new staff members for the "Minecraft" team, while Persson passed the lead developer role to Jens Bergensten. A version for Android and iOS, the "Pocket Edition", has also been released. An Xbox 360 edition of "Minecraft" was released on 9 May 2012. The Xbox edition features updates including a tutorial and skin packs.