Charles Darrow into smaller sets, sold in black cardboard boxes, with boards sold separately from the sets. After Darrow started to take orders from other Philadelphia department stores, Parker Brothers reconsidered. Parker Brothers negotiated the rights from Darrow to produce the game in large scale. Darrow sought and received on the game in 1935, which Parker Brothers acquired. Within a year, 20,000 sets of the game were being produced every week. "Monopoly" ended up being the best-selling board game in America that year, and it made Darrow the first millionaire game designer in history. Darrow was later promoted as the sole inventor
Camelot (board game) considerably more varied than checkers. Parker created a game that was a complex, tactical, but an easily learned and quickly played mixture of Halma and checkers. When finally published by Geo. S. Parker & Co. in 1887, Chivalry won the raves of chess and checkers experts, but the game Parker called "the best game in 2000 years" did not catch on quickly with the general public. However, Parker never lost his enthusiasm for the game, and in 1930 he made a few changes, and Parker Brothers republished it under the name "Camelot". A few more rules changes followed in 1931.