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 sets based on "Minecraft". Two more sets based on the Nether and village areas of the game were released on 1 September 2013. A fourth Micro World set, the End, was released in June 2014. Six more, larger Lego minifigure scale, sets became available November 2014. Mojang collaborates with Jinx, an online game merchandise store, to sell "Minecraft" merchandise, such as clothing, foam pickaxes, and toys of creatures in the game. By May 2012, over 1 million dollars were made from "Minecraft" merchandise sales. T-shirts and socks were the most popular products. In March 2013 Mojang signed a deal with