 As of December 2006, the "Kingdom Hearts" series has shipped over 10 million copies worldwide, with 2.0 million copies in PAL regions, 3.0 million copies in Japan, and 5.6 million copies in North America.The main games in the series were released in chronological order, with each new game following the events of the previous.The exception is the V CAST mobile game, which was developed independently of Square Enix's games.