The most important resource is the viking people. Nothing is done without manual labor. Not only do they need food and homes, but in time, they will require things like warm clothes, pottery, jewels - and lots of mead!
The fate of the people and their coming generations rests on your shoulders.
Your people wants more than just a home and food. In time they will demand more non essential commodities like pottery, mead and jewelry.
No single island has every necessary resource. In order for your people to reach the highest standards of living, you have to manage supplies from multiple islands.
Life is not easy, even though there are no enemies. Your people will face the everlasting threats of sickness, starvation and the freezing temperatures.
Campaign mode offers an increasingly challenging experience. Skirmish mode allows a great amount of customization options like starting conditions and world generating seeds.