trophyBalsamo, a member of our community, has opened a challenge for people to participate in:

This challenge is simple. There is a map with ten cities. There is a sea in the center. One of the cities is small and far from the rest, isolated on its own island. So the goal for the game is to reach the highest population for that city in 15 years. The second goal is to have the highest population overall.

If you are interested, check out the challenge topic in our forum: