FreeCiv - Freeciv is an open-source, turn-based strategy game based on Civilization II.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
Sid Meier’s Civilization VI - Sid Meier’s Civilization VI is a Turn-based Strategy, War, Tactical, Single and Multiplayer video game created by Firaxis and published by 2K.
Rise of Nations - Rise of Nations was launched back in 2003 but is still considered to be one of the most popular and effective real-time strategy (RTS) games of all time.
C-evo - C-evo is a freeware empire building game for Windows
Tropico - Tropico is an Addictive, Strategy, Construction and Management, City Building, Sandbox and Single-player Simulation developed by PopTop Software.