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
Mojang title of ""Caller's Bane"". Mojang began its tradition of developing smaller projects for the Humble Bundle Mojam with a shoot 'em up strategy game with steampunk and Ancient Egypt themes called "Catacomb Snatch". 81,575 bundles were sold, raising US$458,248.99, of which all proceeds were given to four charities and non-profit organizations, including , Child's Play, Electronic Frontier Foundation, and American Red Cross. Both the genre and theme were picked by a survey on Mojang's website (combination of the highest and lowest voted of each). The following year, three mini-games were simultaneously developed for the Humble Bundle Mojam 2. Until July