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 as Java is known to be. However, Mojang developer Tommaso Checchi reassured fans on Reddit that modding was "too important" to "Minecraft" for the Java-based versions to be discontinued. Mojang released version 1.9 of "Minecraft" for the PC in early 2016, and with this update the company promised that the creation and updating of mods would be significantly simplified. Previous updates have been known to break available mods, forcing creators to spend considerable time updating them. In April 2017, Mojang announced the upcoming creation of a so-called "Minecraft Marketplace", where players would be able to sell user-created content for the