90		Club Penguin Island (Windows, 2018)
72		The Saga of Ryzom (Windows, 2004)
60		Final Fantasy XI Online (Windows, 2002)
60		RuneScape (Windows, 2001)
46		MapleStory (Windows, 2006)
46		Guild Wars (Windows, 2005)
46		Atlantica Online (Windows, 2008)
46		Age of Conan: Hyborian Adventures (Windows, 2008)
46		World of WarCraft (Windows, 2004)
44		Star Trek Online (Windows, 2010)
44		Aion (Windows, 2009)
44		EverQuest II (Windows, 2004)
43		Dark Age of Camelot (Windows, 2001)
43		Guild Wars 2 (Windows, 2012)
42		Asheron's Call 2: Fallen Kings (Windows, 2002)
42		EverQuest (Windows, 1999)
41		Realms Online (Windows, 2011)
41		Tibia (Windows, 1997)
41		Villagers & Heroes of a Mystical Land (Windows, 2011)
41		Anarchy Online (Windows, 2001)
41		Meridian 59 (Windows, 1996)
41		Earth & Beyond (Windows, 2002)
40		A Chinese Ghost Story Online (Windows, 2012)
40		Black Desert Online (Windows, 2017)

Notes: Games similar to Pirates of the Caribbean Online, Games like Pirates of the Caribbean Online, Disney Online, Windows, Role-Playing, RPG, Fantasy, Massively Multiplayer, Persistent, 3rd-person, Other, Naval, Watercraft, Pirates of the Caribbean, Sea Pirates, PC, Game Similarities.