To make a discard pile, the top card in this stack is turned face up. Each player draws a card from the draw or discard pile, after which they discard one card from their hand. The round keeps going until latest rummy appa player knocks or goes "gin," indicating that they have used all but one of their cards to form legal combinations. Since players in Gin Rummy score points according to the number of unmatched cards in their opponent's hand at the end of a round, scoring can be complicated. Examining the Common Rummy Game Variations Rummy has many different variations, each with its own set of rules and gameplay elements.