Each of the six reels can hold varying amounts of symbols, which alters the number of ways to win. But Big Time Gaming’s version adds a new dimension with the Megaways format. This isn’t the first slot game based on Monopoly, and we’re sure it won’t be the last. As our Monopoly Megaways slot review will show, casino games developer Big Time Gaming now brings this classic right up to date. Playing Monopoly has been a hugely popular pastime since the 1930s.