On May 10, 1940, the Netherlands was invaded by the Nazis. Within hours, a secret mission was undertaken to prevent the city’s priceless cache of industrial diamonds from falling into Nazi hands. On May 5, 1945, Amsterdam celebrates liberation. But you have one final mission: Discover what happened to to the diamonds. Follow the trail left by the resistance to uncover this amazing true story. Groups of 6 or more can be split into competing teams - who will solve the mystery first? (if you would prefer to stay together, that’s fine too!) During the game you will: Walk around discovering interesting buildings, monuments and historical details Solve puzzles while exploring with your friends Learn true stories from the city's history