50		Battle of Europe (Windows, 2006)
44		PlanetSide (Windows, 2003)
42		PlanetSide 2 (Windows, 2012)
42		Star Wars: The Old Republic (Windows, 2011)
40		Firefall (Windows, 2014)

Notes: Games similar to WWII Online: Blitzkrieg, Games like WWII Online: Blitzkrieg, Cornered Rat Software, Strategy First, Inc., Windows, Action, Massively Multiplayer, Persistent, Real-Time, 1st-person, Flight, Aviation, Naval, Watercraft, Tank, World War II, PC, Game Similarities.