Microsoft is working on a new Minecraft game for phones that uses AR to overlay Minecraft as a persistent, massively multiplayer game over the whole planet. Players will be able to build with Minecraft blocks anywhere in public. Players will be able to see avatars of other players and collaborate. Adventure challenges will pop up in the game, with rewards like treasure and rare blocks. Microsoft says it will kick off a closed beta of Minecraft Earth this summer on iOS and Android. Microsoft is also starting with select locations before eventually expanding the game to be truly global.