Lin Qi, chairman and chief executive of games developer Yoozoo, has died from poisoning at age 39.
According to Shanghai police, he died on Christmas day and they have identified one of his colleague named “Xu” as being the main suspect.
Media speculations have been circulating that the person in custady lead the movie arm of Yoozoo.
There was also some speculation among local media that Mr Lin had been poisoned via aged pu’er tea, a fermented Chinese drink.
Mr Lin was believed to have a net worth of around 6.8bn yuan (£960m), according to the Hurun China Rich List.
A part from being heavily involved in game developing, he made successful forays into film production.
He founded Yoozoo in 2009 and successfully led the company through a period where the gaming industry saw substantial changes towards mobile gaming.
The company also issued an emotional statement on its official Weibo microblog.
“Goodbye youth,” it said, adding, “We will be together, continue to be kind, continue to believe in goodness, and continue the fight against all that is bad.”
Apart from its Game of Thrones game, Yoozoo is also the co-publisher of Supercell’s smash-hit game Brawl Stars along with China’s Tencent Holdings.
The company is also known for its connection with the Chinese sci-fi novel Three-Body Problem as it holds the rights for its film adaptation.