Barbarians & Traders Expansion:
4th Edition. You must have the original Settlers of Catan to Play this expansion.

2 - 4 players
Ages 10 & up
Playing time: 60 minutes

Traders & Barbarians is distributed as the third major expansion for The Settlers of Catan, although it is actually a compilation of small expansions and variants. (It is independent of the Seafarers and Cities & Knights expansions, but can be combined with them.)

All of the variants and three of the scenarios have been available from various sources in Europe and the United States or through official websites. The Great Rivers and the Fishermen of Catan have been expanded somewhat for this expansion through extra tiles and player pieces.

This compilation includes 5 scenarios:

The Fishermen of Catan - Originally released in the 05/2006 Spielbox magazine and then subsequently released in Games Quarterly magazine. Expanded in this edition.
The Rivers of Catan - Originally released in the Atlantis scenario box, then subsequently in Games Quarterly magazine as "The Great River". Expanded in this edition to include two rivers, one occupying 4 tiles, and one occupying 3.
The Great Caravan - Originally released as a free expansion in Germany.
Barbarian Invasion - New in this edition.
Traders & Barbarians - New in this edition.
It also includes 4 variants:
2-Player Rules - Use the new "Commercial Chips" to trade with a neutral 3rd player.
Catan Event Cards - Originally released in the Atlantis scenario box, then subsequently released for sale separately. Replaces the dice with a deck of cards to minimize randomness.
The Harbormaster Card - Originally released in the Atlantis scenario box. Gives two victory points to the player with the most harbor points.
Friendly Robber Rules
In Barbarian Invasion, barbarians are invading Catan and the players have to try to stop them with new knight pieces.