Medieval Conspiracy introduces players to the Holy Roman Empire of Germany, which is divided into numberless small earldoms, principalities and bishoprics. The Ruler of the Empire is the Holy Roman Emperor who is elected by the 7 electoral princes. In Medieval Conspiracy players take the role of a mighty noble family attempting to increase their power, gain new countries, all to gain votes of the electoral princes to finally be elected the new Holy Roman Emperor.

Medieval Conspiracy is run by Action Cards and Event Cards. After collecting income, players bid for Event Cards. 3 Event Cards are displayed on their open side. Thereafter players bid for them in turn order. The player who got an Event Card can use it later during his turn. During a player turn players roll the dice of destiny and play Event and Action Cards. That card play results in numerous effects giving each game a new special course. The goal of the game is to gain new countries or conquer them by force from others in an attempt to influence the vote for the Holy Roman Emperor.

-Grant