The mighty river springs from the mountains, flows through the hills, and branches out through the swamp to form a delta at the sea. The river is rich in gold, which collects along the banks. Everyone wants to build as many roads, settlements, and cities along the river as possible to collect the valuable gold (and bonus victory points!)

The Great River Expansion can be played with The Settlers of Catan, The Seafarer's of Catan, and Cities & Knights of Catan.