Arcadia is set in a semi-historical early 17th century France, with most events taking place in and around Paris. Louis XIII is King and ruler, though ministers and the Church also wield considerable influence. The nations of Europe are constantly involved in conflict over religion, territory, and other reasons less obvious to the casual observer. Duelling is a tolerated way of settling disputes between gentlemen, and although honour and status are paramount, corruption lies just below the surface. It is a time when those with ambition, talent and luck can achieve fame and fortune in the military, the government, the Church, as an explorer or merchant, in the arts and sciences, or just by being an active socialite.

The game is free, run through e-mail with support at this site, and for between 20 and 40 players. Each turn represents a month of game time, taking from 2-3 weeks real time. The En Garde! format has become a popular one for PBM games, but the use of e-mail and mailing lists facilitates communication and allows the game to have a more continuous feel. See the Beginner's Guide for further information.