Learn how to play rummy, or rum, and enjoy the simple joy of forming matched a card game, sometimes played with two decks, in which the players try to form. Rummy is a group of matching card games notable for similar gameplay based on matching . There are many variations of the card game Rummy. Cards : (52) Varies on game type. Rummy rules at Ace2Three. Rummy game rules are simple! Learn what is rummy and rules of rummy and start playing online rummy and win cash prizes.