Australia -- the fifth and smallest continent at the beginning of the 1920s. The economic crisis is yet to come -- Australia is booming. Industrial modernization and development are pursued with vigor to help the economy ''down under'' progress. At the same time, the government is arranging for countless National Parks to be set up and is initiating numerous projects to support the natural environment.

Every player leads a troop of rangers who have been assigned the task, by the government, of carrying out various conservation and industrialization projects.