From the back of the box:'SCAN is a family game for 2 to 8 players, Ages 9 and up. It contains two identical decks of cards printed with distinctive markings. To start SCAN, a card in the holder is turned up and players try to be first to locate identical markings on the other set of cards which are spread out on the table. SCAN is tense and exciting, requiring concentration and quick reactions to be a winner.'This is one of those Parker Brothers card games of the late 60s/early 70s. Ages 9 to adult. The object is to 'Collect the greatest number of tan cards by correctly matching designs.' The game consists of 23 tan cards, 23 blue cards, a little red tray, a cover card, three 'bluffo' cards, and the instructions.It is essentially a matching game. A tan card with four complicated patterns on it is revealed, and after deciding which of the four designs you're matching, you have to find the corresponding blue card before your opponent(s) do. If you find it, you get to keep the tan card. The person with the most tan cards wins. - BoardGameGeek