SEOUL/HONG KONG - Shares in Krafton Inc, the Tencent Holdings-backed South Korean company behind blockbuster video game PlayerUnknown's Battlegrounds (PUBG), fell as much as 20 per cent on their trading debut on Tuesday (Aug 10). Analysts attributed the share tumble of South Korea's second-largest IPO to an expensive valuation and China regulation risks, with gaming companies facing uncertain prospects after...