Since its beta launch in 2009, the blocky, world-building adventure game Minecraft has been released on more than 20 different platforms, from PC to consoles to mobile phones, selling 176m copies. News of a Minecraft AR (augmented reality) app leaked a few weeks ago, but now Microsoft has officially announced Minecraft Earth. It is being developed at the company's Redmond campus, using an array of its mobile, GPS and tracking technologies. Minecraft Earth is best pictured as Pokémon Go with building blocks. When you enter the game, you see an overhead map of your surroundings (Microsoft is working with StreetMap), overlaid with the quaint blocky look of the Minecraft world.