There are many different variations of rummy to suit varying tastes and skill levels, so it's not a single game. With their own set of rules & gameplay mechanics, some well-known variatbuffalo slotsions are Gin Rummy, Indian Rummy, and Kalooki. Gin Rummy, for example, is usually played by two players and focuses on making melds as fast as possible while reducing deadwood, or the number of unmatched cards there are at the end of a round. However, Indian Rummy is a favorite among larger groups because it frequently uses two decks and permits more intricate melds.