For more than a decade, Tencent Holdings developer Leo Yao toiled in relative anonymity, churning out one shooting game after another. Then he scored one of the biggest Chinese hits of 2024 with Delta Force, a video game that continues to attract 30 million players daily. Now, Tencent’s top brass have tasked the 43-year-old with helping orchestrate a major shift at China’s most valuable company. Executives see a change in tastes among domestic gamers – long deemed a smartphone-dominant audience...