You begin as several extended families per character, maybe over one thousand people (or a little more), and a handful of villages each (Maybe more like ten), as a tribe with your own unique set of powers. Eventually you will conquer, progress and advance in technology, and move from stone, wood, copper, and brass on to bronze, iron, steel, and even fictional metals. Everyone lives in cottages, thatched huts, maybe even stone buildings, or some of us may even in caves still. 

One day, all the player characters will work together when one of the Clans unites the others into one whole nation, with a single ruler. . . 
There could be examples for your tribe's unique traits. Maybe some of them are gifted in magical arts. Maybe some of them are unusually strong, good at certain works like smithing, etcetera. 

I'm looking for a minimum of five players, most preferably a lot more, like ten