The game formerly known as Planets³ hit Steam this month after a while in the wilderness of alpha. The idea is simple enough: take Minecraft, add a dollop of story, and fold the world into a cube. Then populate the skies with other cube planets with rocky, watery, snowy, or deserty environments. That sounds like a sure thing (it certainly looks very pretty). But does it live up to its potential in our spherical world, which is already dangerously overpopulated by Minecraftbuts?