"Minecraft" is a huge, open-world sandbox game, which was released for the PC in 2009. Since then, it's been released on other platforms, and as of February 2014, it has sold over 14 million copies on the PC, and 35 million across all the other platforms.
Building in "Minecraft" is easy. You get tools, like shovels and axes, to chop down trees and cut through stone. And without a time limit or a place to go, some players have taken their creative freedom to the next level.