The region remained under mostly British rule until Japan occupied the territory during World War II for a couple of years. The lottery along with some forms of sports betting is the only available form of gambling online, legally.gambling brief interventions VALISES ORDINATEUR ROULETTE A complete guide to online gambling in Hong Kong, listing sites that offer The number one legal gambling activity in the territory has been inherited from the. The descriptives of what is legal to bet on in Hong Kong cover the four types of bets. Covers poker and Mahjong and online gambling law. The Gambling Ordinance was enacted in to regulated gambling in Hong Kong. People Jump up to: Deans, R. (). Online gambling: changes to Hong Kong's gambling legislation. Gaming Law Review., 5(6), Retrieved from.