Every version differs from the others due to its unique set of rules and gameplay elements. In classic rummy, players form sets and runs to win. The game is trummy sirypically played with two decks of cards. Conversely, Gin Rummy is usually played in pairs and emphasizes meld formation while reducing deadwood points. While Indian Rummy incorporates aspects of both Classic & Gin Rummy, it also adds special regulations, like the need to form two or more sequences before winning.