On paper, MapleStory is a 2D online RPG with platforming elements. In reality, it's also a quiet cult with an alleged 67 million members. At times, this level of success seems hard to explain: the game's almost never written about by the press, but manages to grind out page after page of FAQ sheet and advice forum postings. Nobody really reviewed it, and it spends little on advertising, but thousands still log in to Maple World every day. And if all of that wasn't unlikely enough, try this: MapleStory's essentially free to play, yet still manages to generate large quantities of money from its community.