MONOPOLY® is a game that can take a long time to play, and some games have lasted anywhere from 12 hours to more than two months. According to Hasbro, the company that makes MONOPOLY®, the longest MONOPOLY® game lasted for 70 days. Details of exactly how and when that longest MONOPOLY® game was conducted are lost to history, although there have been MONOPOLY® games taking place in unusual settings that also set records.