Netmarble acquired SpinX through its holding company based in the Cayman Islands, in an effort to diversify its game portfolios and strengthen global business competitiveness, it said in a regulatory filing.

SpinX, established in 2014, offers casino game mobile apps such as "Cash Frenzy" and reported a 328.9 billion won ($285.99 million) revenue as of end-second quarter of this year, ranking third out of firms in the global mobile social casino genre, Netmarble said.

Netmarble is backed by Tencent, which holds a 17.5% stake in the South Korean game company, the third-largest stake after those of founder Bang Jun-hyuk and CJ ENM.

($1 = 1,150.0300 won)

(Reporting by Joyce Lee, editing by Louise Heavens)