Complex sentence: In 2007, Neowiz Games and Game On, an online game company among the top three in Japan, became strategic partners and Neowiz Games started in 2008 to operate its business through Game On.
Split into simpler sentences: In 2007, Neowiz Games and Game On, an online game company among the top three in Japan, became partners. In 2008 Neowiz Games began to operate its business through Game On.