Settlers of Catan: Cities and Knights
This variation of the original Settlers of Catan changes the base game in three main ways: firstly, there are three new commodities in the game, distinct from resources - paper, cloth, and coins, which can be acquired from Forest, Meadow, and Mountain spaces, respectively. Cities that would normally produce two of one of those resources instead produce one resource and one of the corresponding commodity. (To make commodities easier to obtain, each player starts the game with one city and one settlement on the board.) These commodities allow players to build city improvements that confer various advantages and eventually points. Secondly, the deck of development cards is replaced by three different decks, each corresponding to one of the commodities. Building city improvements gives players a chance to draw these cards with each new roll of the dice. Building more improvements will increase these chances, but cards cannot be bought directly in any way. These cards are similar to the development cards in the base game, but with a wider range of effects. Finally, players can also build knights on the island along their network of roads. These knights can be used to claim certain intersections and move the Robber (taking the place of Soldier cards), but are also used to defend the island from periodic barbarian attacks. If the island is successfully defended, the player(s) with the most knights are rewarded. If not, the player(s) with the fewest knights each have a city downgraded to a settlement.