Line, the chat app_company closing in on 500 million registered users, is doubling down on gaming after announcing_a 10 billion yen ($97 million) fund_for_developers who produce_titles for its social games_platform. It_has also bought a 10 percent stake_in_fast-growing Japanese games publisher_Gumi. Games account for more than half of Line's revenue, but the lion's share of that is generated by users in Japan. The new fund_will launch_in September with the aim of growing the games platform (and its revenues) worldwide. US rival Tango launched a smaller $25 million fund for its Asia-inspired games platform_last month. The 40 games_on Line's platform have racked...