Many variations of rummy were created as it spread across continents, including Indian rummy, Gin rummy, & finally Rummy Diamond. It is believed that Rummy Diamond, the particular 567 slots rummyvariation, first appeared in online gaming platforms in the latter half of the 20th century. This version differs from classic Rummy games in a few ways, including the diamond-shaped card layout and particular meld & set rules. The game became popular in both casual and competitive settings very fast because players liked how it combined strategy and chance.