PlanetSmith is described as 'Disaster strikes a remote research base on a distant moon. Your escape pod malfunctions and slams into an uncharted, Earth-like planet. You wake with nothing but wreckage, your instincts, and a whole world to tame' and is a Sandbox Game in the games category. There are more than 50 games similar to PlanetSmith for a variety of platforms, including Windows, Mac, Linux, Android and Steam apps. The best PlanetSmith alternative is Minecraft. It's not free, so if you're looking for a free alternative, you could try Luanti (formerly Minetest) or Veloren. Other PlanetSmith like games are VoxeLibre (formerly MineClone2), Terasology, LEGO Worlds and Vintage Story.