There are many different variations of rummy, and each has its own set of rules and strategies, so it's not a single game. Knowing these variations is essential for any serious player, whether they are rummy all game listplaying Gin Rummy, Indian Rummy, or even Kalooki. The gameplay of each variation may be greatly affected by its unique meld requirements, scoring systems, and even card values. In Indian Rummy, for example, players are often required to form at least two sequences before they can declare victory, whereas Gin Rummy places more emphasis on forming sets and running quickly to "knock" and end the round.