Lunacraft has been discontinued. Similar games include Minecraft. It's paid, but Luanti (formerly Minetest) and VoxeLibre (formerly MineClone2) are free. Other options are Terraria, Garry's Mod, Terasology and Wurm Online. Sandbox Games like Lunacraft are a crowded field, with more than 25 alternatives for Windows, Mac, Linux, Android and iPhone.
You wake up in an infinite block world. Explore diverse biomes, mine for precious materials, craft powerful tools, build villages, cities, monumental constructions and much more. Place torches to light up your creations and play with the real time physics engine.
Blocks That Matter (BTM) is a 2D indie puzzle platformer.
You are the Tetrobot: a tiny robot that can drill blocks of matter one by one, collect them, and recycle them into new pieces of 4 blocks. You also have the possibility to destroy lines of 8+ blocks in a very «retro.
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BlockWorld is an addictive independent action sandbox game similar to Minecraft with full destruct-able environment, monsters and challenging quests.
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Worldcrafter is a sandbox game in the style of Minecraft. You control an avatar who can move and jump around a world, which is completely different each time you start. The game is designed to be open-ended, so players can decide how they want to play, whether construct...
An 8bit-style 2D massively multiplayer game! It's a giant construction sandbox -- you can build a home or a castle in a persistent streaming world. Found and manage your own city. Fight evil Lawyercats and engage in player vs player battle.
An experimental puzzle strategy where you are not commanding your troops - now, you are shaping the battlefield itself! Nothing is random*, everything is predictable*, and the battlefield is changing. Every turn. By you.
