Watch “Diadem (Fantasy Games Unlimited) Review & How to Play,” a board game review for Diadem from Tabletop Sci-Fi on BoardGameVideo.
Description provided by Tabletop Sci-Fi on YouTube:

1981Scott B. Bizar, Bob Weller, Tim Zorn
About Diadem, from BoardGameGeek:
Designers
Scott B. Bizar, Bob Weller, Tim Zorn
Artist
Bob Charrette
Publisher
Fantasy Games Unlimited
Categories
Mechanics