High Quality Content by WIKIPEDIA articles! The Seafarers of Catan (German: Die Seefahrer von Catan) is an expansion of the board game The Settlers of Catan for three to four players (five to six player play is also possible with both of the respective five to six player expansions). The main feature of this expansion is the addition of ships to the game, allowing play between multiple islands. The expansion also provides numerous scenarios, some of which have custom rules. The Seafarers rules and scenarios are also, for the most part, compatible with Cities and Knights of Catan and Catan: Traders & Barbarians.