Released in 1978, a socialist alternative to Monopoly sold over 200,000 copies and was translated into multiple languages.
Mental Floss has a nice piece of floss with The Story of Class Struggle, America’s Most Popular Marxist Board Game. Class Struggle, the board game, was developed by a political science professor, Bertell Ollman, who wanted an alternative to Monopoly, which ironically was based on the Landlord Game which had been originally designed to show the evils of property. Class Struggle was sold to Avalon Hill who eventually discontinued it. It looks like you can find copies on eBay.