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 mods time. Mojang stepped in to save the project. Another controversy came about in March 2017, when Slovakian cybercompany ESET revealed that 87 examples of trojan horses were distributed through the Google Play Store under the guise of "Minecraft" mods. Their purpose was to either aggressively display ads or con players into downloading other apps. Combined, these fake mods gathered over one million downloads in the first three months of 2017. The total number of Minecraft mods is officially very hard to calculate because of the sheer number of them, both old and new ones, but one of the repository websites,