The Parker Brothers rules, rather. The game was a folk game before its acquisition by Parker Brothers, and their rules are a slightly simplified version of the Quaker variant learned by the man responsible for the graphic design of the published version of the game. House rules trace their lineages to versions of the game before Parker Brothers published it, and are equally valid. Although money on Free Parking introduces a ton of randomness, lengthens the game significantly, and is bad, it is no less real.