Ratuki Its easy to play, fun to win and totally addictive! Build piles of cards from 1 to 5, but watch out: its a card-slamming frenzy! Be the first to slam a 5 on the top of the deck, shout Ratuki! and the cards are yours. Get slamming and get winning! Card-slamming game challenges you to build piles of cards from 1 to 5  but if someone else slams a 5 on top, you lose your cards! Includes 170 cards, 5 reminder cards and instructions. For 2 to 5 players.