Masterspace is described as 'Game about mining, creating and exploring, featuring fully destructible smooth terrain and spaceships that allow you to travel between different planets' and is a Sandbox Game in the games category. There are more than 50 games similar to Masterspace for a variety of platforms, including Windows, Mac, Linux, Steam and Android apps. The best Masterspace alternative is Minecraft. It's not free, so if you're looking for a free alternative, you could try Luanti (formerly Minetest) or Roblox. Other Masterspace like games are Terraria, Garry's Mod, VoxeLibre (formerly MineClone2) and Rust (Game).