Minetest game is an open-source replacement for the famous game Minecraft , and where that Minetest game is completely free , unlike Minecraft , which is under the LGPL license and is available for Windows , Mac and Linux .
Minetest supports multiplayer ( online ) and dynamic lighting , and support modular construction of different survival and creative.
To install Minetest on Ubuntu 12.04 \ 12.10 \ 13.04 , open the terminal run the following command :
sudo add-apt-repository ppa:minetestdevs/stable && sudo apt-get update && sudo apt-get install -y minetestc55