NPP

NPP ('non-player planet', a joke on 'NPC' meaning 'non-player character') is a made-up term for a world that is invented mainly as a plot convenience for the Twine Wars, and not 'developed' by a writer beyond being a resource and/or battleground.

This is of course doing many worlds injustice, but we can't focus on all of them to as large a degree as we'd like.