It's a whole new game with Catan: Traders & Barbarians - 5-6 Player Extension. This extension allows up to 6 players to play so you can face even more competition from your fellow settlers. You'll need the Catan base game, Catan: Traders & Barbarians expansion, and Catan: 5-6 Player Extension to play with this extension. | Catan: Traders & Barbarians - 5 to 6 Player Extension