86		Age of Conan: Hyborian Adventures (Windows, 2008)
86		Atlantica Online (Windows, 2008)
85		Guild Wars 2 (Windows, 2012)
84		World of WarCraft (Windows, 2004)
84		Guild Wars (Windows, 2005)
83		Villagers & Heroes of a Mystical Land (Windows, 2011)
83		Dark Age of Camelot (Windows, 2001)
82		Asheron's Call 2: Fallen Kings (Windows, 2002)
82		EverQuest II (Windows, 2004)
82		EverQuest (Windows, 1999)
55		The Lord of the Rings Online: Shadows of Angmar (Windows, 2007)
54		Richard Garriott's Tabula Rasa (Windows, 2007)
54		MapleStory (Windows, 2006)
53		City of Villains (Windows, 2005)
52		City of Heroes (Windows, 2004)
52		A Chinese Ghost Story Online (Windows, 2012)
51		Tibia (Windows, 1997)
51		Meridian 59 (Windows, 1996)
51		The Matrix Online (Windows, 2005)
50		Club Penguin Island (Windows, 2018)
50		Star Wars: Galaxies - An Empire Divided (Windows, 2003)
50		The Saga of Ryzom (Windows, 2004)
46		Warhammer Online: Age of Reckoning (Windows, 2008)
43		Pirates of the Caribbean Online (Windows, 2007)
41		Ragnarök Online (Windows, 2002)
41		Ultima Online (Windows, 1997)
40		Albion Online (Windows, 2018)
40		Nexus: The Kingdom of the Winds (Windows, 1998)
40		RuneScape (Windows, 2001)
40		Final Fantasy XI Online (Windows, 2002)

Notes: Games similar to Aion, Games like Aion, NCsoft Korea, NCSOFT West, Windows, Role-Playing, RPG, Fantasy, Massively Multiplayer, Persistent, Real-Time, Behind view, CryEngine 1, PC, Game Similarities.