The 5&6 player faction expansion for District 9: The Boardgame requires the core game in order to be used. These factions may be used in two different ways. ALTERNATE FACTION: In a 2-4 player game, the Prawn Engineer or MNU Science Division may be selected by a player and set up as normal as defined by the setup section of the core rulebook. ADDITIONAL PLAYERS: If desired, the new factions allow for 5 & 6 player games of the District 9 boardgame. To use the expansions in this manner, simply follow the setup section of the core rulebook, and add steps for the 5th and/or 6th player. —description from the publisher