Cattack! No.1 is a game of cats playing volleyball. Two players cooperate in coaching a team. Each holds up to three cards with arrows in their hand. With these, they try to steer the ball towards and eventually across the net. Quick attacks prevent the opposing team to fill up their hand cards, but are also usually less coordinated. Well-prepared articles allow the attacker to draw a random defense card from an opponent. A team that cannot hit the ball across the net with a maximum of three cards, loses a point.
One cat of the scoring team then goes to sleep. A ball that hits that cat's sector is an automatic point, but it also wakes up the sleeping cat. First team to reach three points wins the game.