A knock option & an alternative scoring system are two of the unique rules of Gin Rummy, a game played between two players. Jokers are used rummy rummy downloadas wild cards in Indian Rummy, another well-liked variation that ups the complexity of the game. It is played with two decks of cards. Other noteworthy variations include the rummy game Canasta, which originated in Uruguay and gained popularity in North America during the 1950s.