In a time long forgotten, the cruel Fomori rule over Érin, the green island. They praise their king Balor, who reigns from his fortifications in the north with an iron fist. Old paths and ruins spread over the island's face, which will be called Ireland many generations from now. But new tribes arrive at the island striving for permanent presence. Who will control Érin's fate over the next centuries to come?
Each player in The Arrival represents a tribe leader who tries to gain predominance over the mythical island of Érin while pushing back the demon-like Fomori. But the players are facing a dilemma, for spreading too quickly means becoming more and more corrupt and strengthening the Fomori in their power...