Catan: 25th Anniversary Edition contains the Catan base game, the Catan: 5-6 Player Extension, the Helpers of Catan scenario, special iridescent anniversary wood pieces and dice, resource card sorting trays, and card sleeves.
Catan (formerly The Settlers of Catan), players try to be the dominant force on the island of Catan by building settlements, cities, and roads. On each turn dice are rolled to determine what resources the island produces. Players collect these resources (cards)—wood, grain, brick, sheep, or stone—to build up their civilizations to get to 10 victory points and win the game.
Catan Scenarios: Helpers of Catan – a mini-expansion for Catan – consists of ten character cards, each of which has a different special ability that the player can use once or twice before trading for another. For example, Marianne lets you take any one resource card if you rolled something other than a 7, but didn't get resources from that roll. As each player builds her second settlement, she takes a specific card based on player order, with approximate utility increasing to help combat earlier player advantage. A player must use her card's ability before she may turn it in, but she may choose which card to take, adding a level of strategy.
Catan: 5-6 Player Extension – Allows you to add up to two more opponents to the game. The only change in the rules is that there is a building round at the end of each turn in which any player can build.