Popular Rummy Variations. Played with two players, Gin Rummy is a popular variation where the object is to form sets and runs in your hand as quickly as ng slotspossible. Played with two decks of cards & featuring unique combinations like "pure" and "impure" runs, Indian Rummy is another variant. Flexibility in Varying Circumstances. In order to comply with the unique regulations and goals of every variation, players must modify their tactics & style of gameplay.