By the end of the III century the Roman Empire is doomed. Enemies surround the borders, instability spreads over the provinces, and whenever a Roman Emperor has the courage and ability to fight a threat, usurpers take his place in Rome and increase the chaos. The Emperor Diocletian only sees one, revolutionary way out: share the power with some trusted colleagues. In a few years he creates an Imperial College together with Maximian, Constantius and Galerius, forming the first 'Tetrarchy'. Now their enemies are doomed...

TETRARCHIA (Latin of Tetrarchy, "leadership of four") is a cooperative game in which 1 to 4 players take the role of the 4 Emperors, fighting the revolts within the Empire and the Barbarian armies that try to bring it down. With simple rules, the core engine leads to very different games and many interesting choices:

- Up to 81 difficulty challenges.- That you can combine with up to 5 variants (including special powers and a competitive mode).- That you can combine with up to 3 expansion modules (from Tetrarchia: Dux).- Plus 4 historical scenarios since July 2017 (for earlier copies you can download them here).

The flow of each Emperor's turn is very simple: spend up to 6 'Imperivm Points' (IP), and then propagate threats with the roll of two dice. The Emperors can spend their IP in: Move to a linked province, order a Roman fleet to Sail to an adjacent sea zone, Secure the province by placing one of their tokens, Subdue the province by removing the Unrest/Revolt token, or Attack a Barbarian army in a linked province. The players win if they secure the borders of the Empire before the majority of provinces revolt or Rome falls.