CATAN - The Helpers is an expansion. A copy of CATAN is required to play.
In CATAN – The Helpers, twelve helpful new characters are eager to lend a hand. Thorolf, Asla, and other Catanians provide special abilities you can use during your game of CATAN or CATAN – Seafarers.
For example, Stina makes it easier for you to trade cards, Högni allows you to move a road, and Digur sends the robber back to the desert. Adepts say that this scenario adds even more variety and excitement to CATAN without making it more complex.