Diadem is a game focused on galactic conquest, played on a mapboard divided into 12 hexagon-shaped sub-maps.[1]
Reception
David Ladyman reviewed Diadem in The Space Gamer No. 46.[1] Ladyman commented that "In sum, I won't tell you not to buy Diadem, but I don't recommend it. There are better-reasoned space warfare games on the market."[1]