84		King & Assassins (Windows, 2018)
81		Lords of the Realm II (DOS, 1996)
81		Lords of the Realm II (Windows, 1996)
75		Three Kingdoms: The Last Warlord (Windows, 2017)
74		Xenonauts (Windows, 2014)
54		I'm Not a Monster (Windows, 2018)
53		Broadsword: Age of Chivalry (Windows, 2015)
53		Medieval: Total War (Windows, 2002)
53		Medieval II: Total War (Windows, 2006)
53		Age of Empires II: The Age of Kings (Windows, 1999)
52		X-COM: Apocalypse (DOS, 1997)
52		X-COM: Apocalypse (Windows, 1997)
52		Disciples II: Dark Prophecy (Windows, 2002)
51		Battle Worlds: Kronos (Windows, 2013)
50		UFO: Extraterrestrials (Windows, 2007)
50		Gates of Troy (Windows, 2004)
50		Star Trek: Away Team (Windows, 2001)
50		Romance of the Three Kingdoms VII (Windows, 2000)
50		Urban Legend (Windows, 2007)
50		Laser Squad: Nemesis (Windows, 2005)
50		Cuban Missile Crisis: Ice Crusade (Windows, 2005)
45		Wartile (Windows, 2017)
45		Insidia (Windows, 2017)
44		HexLab (Windows, 2018)
42		X-COM: Terror from the Deep (Windows, 2007)
42		Warmachine: Tactics (Windows, 2014)
42		X-COM: Terror from the Deep (DOS, 1995)
42		Hearthlands (Windows, 2014)
41		Ærena: Clash of Champions (Windows, 2013)
40		Harukaze Sentai V-Force (Windows, 1997)
40		Final Liberation: Warhammer Epic 40,000 (Windows, 1997)
40		Warhammer 40,000: Chaos Gate (Windows, 1998)
40		Centurion: Defender of Rome (DOS, 1990)

Notes: Games similar to Oldage: Tactics Online, Games like Oldage: Tactics Online, Hmmm Games, Windows, Strategy, Tactics, Medieval, Turn-based, Bird's-eye view, Isometric, PC, Game Similarities.