During Sigismundus Augustus: Dei gratia rex Poloniae, a board game for 3 to 5 players, each player rules one of the 16th-century noble families. The aim is to establish the position of the House in Rzeczpospolita and in the international arena. To gain more prestige than other players and win the game, each House has to fight for the influence in Sejm or for authority among neighbors, while also maintaining a strong and effective army. Sigismundus Augustus: Dei gratia rex Poloniae - Bona Sforza d'Aragona is a double-sided promo sheet that represents the ambiguous opinions on Queen Bona circulating among historians. One side shows her as generous and helpful, while the other as treacherous and poisonous; each side has an ability that can be used once per round.