One game, three ways to play
PartialA world's rules are meant to come from a scenario file rather than a menu, and that file is yours to edit. Three ship as baselines: raiding against other players, surviving alone or with friends, and building with nothing in your way.
Because it is a file, a scenario nobody shipped counts just as much. Homesteading, say: you start with tools and some cash, buy property, buy your supplies, and can only dig and build on land you own.
Today a world stores two settings and there is no scenario file yet. It is the shape the rest of the game is being built to fit.