Manic Digger is a action game released in 2015 designed and developed by Manic Digger team. Manic Digger can be described as a full free, open source game and can be played on the following operating systems: Windows, Linux, Mac OSX. Manic Digger is also a multiplayer game.
“Manic Digger is an open-source implementation of block-building games as made famous by Minecraft. Manic Digger is a free sandbox game in which you build using square blocks made of varying elements and materials.” - Manic Digger team