The goal is to conquer the world either through military or economic strength. Players can build army and naval units. To do so requires resources. Once the units are built they require a continual input of resources in the form of maintenance.
Armies require grain to move and navies require oil.
In addition, salaries must be paid for each army and naval unit. Each country on the board is capable of producing certain types of resources. Players can gain access to those resources by capturing the country in question and playing the appropriate resource card. Alternatively, players can buy or sell resources on the global market. Supremacy is a more detailed version of the classic game Risk .