Gin Rummy is a popular card game typically played by two players. The objective is to form sets and runs of cards, which are combinations that can help you score points. Each player is dealt ten cards, and they take turns drawing and discarding cards to improve their hands. The game ends when one player "knocks," indicating they have formed valid combinations with most of their cards. Players score points based on the unmatched cards left in their opponent's hand. The game can be played over multiple rounds, with the first player to reach a predetermined score declared the winner. Rummy games, including Gin Rummy, are known for their strategic elements and social interaction.