The goal is to combine every card you have into sets and runs that are valid before your opponents do. There are multiple versions of the game, each with its own special rules and subtleties, and it can be played royally rummywith two or more players. In order to succeed at Rummy, players need to understand not just the fundamental rules but also the underlying tactics that can help them win. Keeping track of the cards that have been played and those that are still in play is one of the most important parts of learning how Rummy works. Players are able to choose which cards to keep and which to discard with knowledge thanks to this awareness.