Battlefield Online (Korean: 배틀필드 온라인) is a free online first person shooter developed by Neowiz Games, Electronic Arts and EA Digital Illusions CE, and distributed by Neowiz Games. It is a remake of Battlefield 2. However, its game engine is Battlefield 2142's modified Refractor Engine 2, with graphic-improvements over Battlefield 2. It was developed by Neowiz Games of South Korea with oversight from license-holder Electronic Arts. Having started its second beta test, Battlefield Online unlike Battlefield 2 has shown support for 100-maximal-player battles. The open beta testing of the game was started on March 30, 2010.