Minetest is an InfiniMiner/Minecraft(/Dwarf Fortress) inspired game, released as open source, with a goal of becoming one of the first Minecraft-style games that take the survival multiplayer gameplay to a somewhat different direction.
As of 29th August 2015 it supports user-hosted multiplayer over network and a Lua modding system allowing modders to create anything from the basic minecraft stuff: a randomly generated terrain, digging, placing blocks, crafting items and tools and other stuff and using them, to cool stuff like helicopters, teleporters, mesecons, andprotector blocks that prevent griefing. Unlike modding in minecraft, which requires installation of a modloader that hacks into the game, Minetest supports modding by default.... More Info »
Version 0.4.13 has finally been released, with cinematic mode and minimap! Full changelog at http://dev.minetest.net/Changelog#0.4.12_.E2.86.92_0.4.13