Understanding Rummy: A Complete Guide For centuries, players all over the world have been enthralled with the popular card game rummy. The fundamental idea of the game is to use a standard deck of caslots online gamesrds to form sets and sequences. The goal is to combine cards into legitimate combinations, which can include sets (three or four cards of the same rank) and runs (cards of the same suit that occur consecutively). The basic ideas are the same for all variations, even though the rules may differ slightly based on the particular variation being played, such as Gin Rummy, Indian Rummy, or Kalooki.