In the naval combat simulation game Rule the Waves III, players take on the role of Grand Admirals and build their own armies between 1890 and 1970. They may be in charge of their naval budget, the construction of various ships, and the navigation of historical events and treaties. Because the game lays a significant emphasis on realistic ship construction and research mechanics, careful strategic planning is essential to react to the changing maritime environment. Players must participate in espionage to keep tabs on enemy navies and plan for the development of submarines, airships, aircraft, and missiles. To safeguard their navy, fortifications, and coastal defenses must be created.