The Steam Special Edition of Tropico 3 contains the following additional content: Two additional maps for the sandbox mode: Verde Playa Coco Chico Map Two additional costumes for the el presidente avatar editor: Female Avatar: Casual Clothes Male Avatar: Casual Clothes Two additional accessories for
Most popular community and official game content for the past week.  (?)
What does popular mean?
It means the content you're seeing has been rated up more than it has been rated down for the given time period.