85		Sid Meier's Civilization II (Windows, 1996)
82		Civilization: Call to Power (Windows, 1999)
80		Civilization II: Test of Time (Windows, 1999)
71		Call to Power II (Windows, 2000)
70		Tom Clancy's ruthless.com (Windows, 1998)
60		FreeCol (Windows, 2003)
57		Sid Meier's Civilization (DOS, 1991)
54		Populous (DOS, 1989)
54		Sid Meier's Civilization IV (Windows, 2005)
53		Sid Meier's Civilization VI (Windows, 2016)
53		Sid Meier's Civilization V (Windows, 2010)
51		1503 A.D.: The New World (Windows, 2003)
51		Trevor Chan's Capitalism II (Windows, 2001)
51		Aggressors: Ancient Rome (Windows, 2018)
50		Commands & Colors: Ancients (Windows, 2018)
50		Populous (Windows, 2011)
50		The Nations (Windows, 2001)
45		Merchant Prince (DOS, 1993)
44		Master of Magic (DOS, 1994)
43		XCOM 2 (Windows, 2016)
43		XCOM: Enemy Unknown (Windows, 2012)
42		Machiavelli the Prince (DOS, 1995)
42		1701 A.D. (Windows, 2006)
41		Majesty: The Fantasy Kingdom Sim (Windows, 2000)
41		Sid Meier's Civilization: Beyond Earth (Windows, 2014)
40		Rotlicht Tycoon (Windows, 2003)
40		Trade Empires (Windows, 2001)
40		Dominions 5: Warriors of the Faith (Windows, 2017)
40		Deadlock II: Shrine Wars (Windows, 1998)
40		Nemesis of the Roman Empire (Windows, 2004)
40		The Great Art Race (Windows, 2004)
40		Skyshine's BEDLAM (Windows, 2015)
40		GhostControl Inc. (Windows, 2014)
40		Master of Magic (Windows, 1997)
40		Skyshine's BEDLAM: Redux! (Windows, 2016)
40		Cuban Missile Crisis: The Aftermath (Windows, 2005)

Notes: Games similar to Oil Barons, Games like Oil Barons, Starsoft Development Laboratories, Inc., Lobo Software, DOS, Strategy, Tactics, Managerial, Business Simulation, Turn-based, Bird's-eye view, Isometric, PC, Game Similarities.