StarForge is described as 'Game about gathering resources, building bases, crafting anything you want, and surviving on an alien planet. Earth's star is dying and humanity transferred as much technology and resources as possible and left on a one way mission to populate another planet' and is a Sandbox Game in the games category. There are more than 10 games similar to StarForge for a variety of platforms, including Windows, Steam, Mac, Android and iPhone apps. The best StarForge alternative is Minecraft. It's not free, so if you're looking for a free alternative, you could try Voxelands or Minecraft Earth. Other StarForge like games are Terraria, Garry's Mod, Creativerse: The Definitive Edition and Space Engineers.