Rummy Variation is a type of card game that can be played with two or more players. Two popular variations are Canasta, which is a seven-letter game, and GIN, which is a three-letter game. Canasta is a rummy-style game that involves creating melds of seven cards of the same rank. GIN is a two-player game where the goal is to form sets and runs of cards and reduce the number of points in one's hand. Both games involve drawing and discarding cards and require strategy and skill to win.