"Spiritual opium" is how the Chinese brand video games. After a tightening of the noose around the industry and rules at the start of the school year that limit screen time for teens to three hours a week, Fortnite has announced that it is folding. Three years on and one billion dollars spent, the popular survival game never got regulatory approval, despite the financial backing of Chinese tech giant Tencent. So what is the matter with Fortnite?