SkyZone Entertainment

SkyZone Entertainment, Inc. is an SK Group company and an international mobile entertainment company that creates and delivers fun and exciting "Made for Mobile" content. The company's offerings include brand name games and cutting-edge applications such as 3D games, mobile-enabled Web portals, and wallpapers. SK Group is Korea's third-largest conglomerate with annual revenues exceeding US $50 billion. The organization consists of more than 40 leading companies, including SK Telecom, Korea's leading wireless service provider and recognized pioneer in the commercialization of 2.5G and 3G wireless service and applications.

In 2006, SkyZone published Ragnarok Mobile, GRAVITY's first ever role-playing title for mobile phones.