Please note you will need the rivals for catan in order to play this expansionr r r r 3 theme 125 card expansion for the two player card gamefirst theme the era of explorers set sail from catan explore discover new lands your explorer harbor serves as a starting point for your exploration of 9 adjacent sea cards pirates islanders and shipwrecks await across the waters embark on missions and try to be the best explorer ship tokens chart your position victory awaits the most