This extension requires Catan to play! Add 1-2 more friends or family without sacrificing ease of play. Add green and brown settlers and expand your island with 2 more harbors and 11 unique, new terrain tiles. This is NOT a complete game! It is only a game extension for 5-6 players. You need a Catan game (aka The Settlers of Catan) in order to play with this extension! New 2017