High Quality Content by WIKIPEDIA articles! Square Enix is a Japanese video game development and publishing company formed from the merger on April 1, 2003 of video game developer Square and publisher Enix. The company is best known for its role-playing video game franchises, which include the Final Fantasy series, the Dragon Quest series, and the action-RPG Kingdom Hearts series. Of its properties, the Final Fantasy franchise is the best-selling, with a total worldwide sales of over 100 million units. The Dragon Quest series has shipped over 57 million units worldwide and is one of the most popular video game series in Japan, while the Kingdom Hearts series has shipped over 12 million copies worldwide. Since its inception, the company has developed or published hundreds of titles in various video game franchises on numerous gaming systems.