Numerous variants of rummy have emerged, each with its own set of rules and strategies for play. Developed in the early 20th century, Gin Rummy is one real casino slots onlineof the most well-liked variations. The goal of Gin Rummy is for players to minimize the point value of the unmelded cards in their hands while forming sets and runs. Players can earn rewards for going "gin," or melding all of their cards without any unmelded cards left, in this special scoring system.