Enter "Mummy's desert" as a case-sensitive city name to unlock the Egyptian building set.
Enter "Ancient culture" as a case-sensitive city name to unlock the Greek building set.
Enter "Become wild" as a case-sensitive city name to unlock the Jungle building set.
Enter "Future picture" as a case-sensitive city name to unlock the Sci-Fi building set.
Successfully complete the indicated task to unlock the corresponding structure: