Sidereal Confluence is a cooperative/competitive board game for 3-9 players. It is cooperative, as no player will start with all of the resources necessary to run their economy forcing them to trade resources with other players....but you are still trying to win the game. You score victory points by researching technologies, as a result of running your converters or even by trade and at the end of 6 turns a winner is determined. So be careful with your trades, lest you help your opponents too much and yourself too little.A variety of different factions = with their own advantages and disadvantages allow for a variety of game play styles and choices for players. A suite of optional rules allow for advanced players to better tailor game play for their groups preferences.