Build a city with at least 20,000 inhabitants in total and at least 2,000 inhabitants in the highest (3rd) class, which have all houses evolved on the maximal available level.
Complete the 10th mission during which you can have a maximum of one small port built at a time. There are no restrictions on buildings other than ports.
Accommodate the first inhabitant from the highest (3rd) class within ten years from the start of the mission. Only missions with an empty/non-historic start can be used.
Build a city with at least 32,000 inhabitants from the lowest class, 12,000 inhabitants from the middle class and 6,000 inhabitants from the highest class.