63		Machiavelli the Prince (DOS, 1995)
62		Merchant Prince (DOS, 1993)
60		Invasion (Windows, 2008)
60		Birth of America II: Wars in America 1750-1815 (Windows, 2008)
60		The Mastermind (Windows, 2005)
60		Global Thermonuclear War (DOS, 1985)
59		Imperialism (Windows, 1997)
57		M.A.X.: Mechanized Assault & Exploration (Windows, 1996)
56		M.A.X.: Mechanized Assault & Exploration (DOS, 1996)
56		Pacific General (Windows, 1997)
56		Stars! (Windows, 1996)
56		Imperialism II: The Age of Exploration (Windows, 1999)
55		Space Empires III (Windows, 1997)
55		Sid Meier's Civilization (DOS, 1991)
54		Imperium Galactica (DOS, 1994)
54		Emperor of the Fading Suns (Windows, 1996)
54		The Rise & Rule of Ancient Empires (Windows, 1996)
52		Space Empires IV (Windows, 2000)
52		Master of Orion 3 (Windows, 2003)
51		Imperium Rex (DOS, 1993)
50		Sword of Aragon (DOS, 1989)
50		'Nam 1965-1975 (DOS, 1991)
50		Spoils of War (DOS, 1991)
50		Spaceward Ho! (DOS, 1992)
50		Stars in Shadow (Windows, 2017)
50		Bandit Kings of Ancient China (Windows, 2017)
50		Bandit Kings of Ancient China (DOS, 1989)
50		Age of Civilizations II (Windows, 2018)
50		Rise of Prussia (Windows, 2010)
50		AGEOD's American Civil War (Windows, 2008)
50		Reach for the Stars: The Conquest of the Galaxy (DOS, 1988)
50		Starship Kingdom (Windows, 2007)
50		Anacreon: Imperial Conquest in the Far Future (Windows, 2004)
50		StarDrive II (Windows, 2015)
50		Making History II: The War of the World (Windows, 2010)
50		Anacreon: Reconstruction 4021 (DOS, 1987)
50		Victory & Glory: Napoleon (Windows, 2016)
47		Master of Magic (Windows, 1997)
45		Tom Clancy's Politika (Windows, 1997)
45		Master of Magic (DOS, 1994)
42		FreeCol (Windows, 2003)
40		Worlds at War: Conflict in the Cosmos (DOS, 1991)
40		Sovereignty: Crown of Kings (Windows, 2017)
40		Planet M.U.L.E. (Windows, 2009)
40		Golem (Windows, 2004)

Notes: Games similar to Great Nations, Games like Great Nations, Windows, Strategy, Tactics, 4X, Managerial, Business Simulation, Turn-based, Top-down, PC, Game Similarities.