You can check the downloading method with a complete description from here. You can also play this game for free but unfortunately, that demo version is limited and offers you to play for a short time being. Minecraft Java Edition for PC and Mac is quite expensive and costs round about $26.95. You cannot play this game free of cost neither it is available online. Moreover, you can play this game on Windows, Android, iOS, Mac/Linux. Build your own cities, forts, castles, shops, buildings and many more. You can create your own world with different types of blocks. All those people who want to build their own type of world and run it with their perception.
And also encourages players on building a variety of different blocks in a 3D procedurally generated world. It is the best mixture of thrill, fight, explore the play area, build up things. Download Minecraft 1.8 Free Full Version PC is one of the most popular sandbox games which brings a lot of new features in it.