Increasing Your Prospects for Achievement. You can hone your abilities & rise to prominence as a formidable opponent in the game of rummy with patience and practice. You can become a rummy champion by keeping an eye on the cardslots game 777s that are being discarded, choosing your holding cards wisely, and adjusting to the gameplay. With a plethora of variations, rummy is a flexible game with distinct gameplay and rules for every player. Gin Rummy is a widely played variant in which two players use a standard 52-card deck to play the game. Forming runs and sets of cards in your hand is the goal of gin rummy, but there's also an extra element of pressure to "knock" before your opponent.