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

Notes: Games similar to Global Thermonuclear War, Games like Global Thermonuclear War, PC-SIG, DOS, Strategy, Tactics, Managerial, Business Simulation, Turn-based, Top-down, PC, Game Similarities.