HONG KONG—A Chinese public-interest group said on Tuesday it is suing Tencent over what it alleges is inappropriate content for minors in the top global game developer’s flagship video game, Honor of Kings. Beijing Teenagers Law Aid And Research Center said it filed the lawsuit in a Beijing court on Tuesday, to mark the implementation of an amended protection of minors law. The suit, whose content Reuters could not independently confirm, also coincides with an unprecedented antitrust crackdown by Beijing on some of China’s biggest tech companies that sources told Reuters includes Tencent. The company, which declined to comment when contacted by Reuters, has progressively lowered the recommended age limit for the game from 18 in 2017 to 12 this year, the public-interest group said. In a posting on its social media account, it said some of the game’s characters wore low-cut clothes and that its storyline tampered with historical …