The Shanghai police statement pointed to one of Mr Lin’s colleagues – identified only by his surname Xu – as the main suspect.
Mr. Lin was believed to have a net worth of around 6.8bn yuan (£960m), according to the Hurun China Rich List.
Many employees and ex-employees gathered outside Yoozoo’s office on Friday to mourn his death.
Details are scant but Mr Lin is believed to have been poisoned, based on police statements.
Yoozoo released its own statement, saying Mr Lin had admitted himself to hospital after feeling unwell but was in a stable condition.
Things took a dramatic turn on Friday when the company announced its founder had died.
According to local media reports, the person in custody could be Xu Yao, who heads Yoozoo’s movie production arm.
There was also some speculation among local media that Mr. Lin had been poisoned via aged Pu’er tea, a fermented Chinese drink.
In addition to Game of Thrones, Lin also made many other hit games. A statement from Shanghai Police said, “One of Lin’s aides is the main suspect. However, police have not released the name of the person. Only her nickname is addressed as Xu.
According to the Hurun China Rich List, Lin’s net worth is about 6.8 billion yuan ( 1 billion). Thousands have commented on the post about his death, which has been viewed 290 million times on Weibo. Agency