A run is made up of three or more consecutive cards of the same suit, whereas a set is made up of three or four cards of the same rank but different suits. However, by using cards of different colors, Rainbow gaming app downloadRummy adds a vibrant twist that can have a big impact on gameplay. Each player starts the game with a certain number of cards, usually 13. The remaining cards are then arranged in a draw pile. Players take turns selecting cards from the discard or draw piles in an effort to form combinations that are allowed. The round is over when one player successfully melds all of their cards into sets and runs that are valid.