(From back of box for Set 2: Rachel and Marco)You've read the hot book series. You've watched the hit TV show on Nickelodeon. Now it's time for YOU to put an end to the Yeerk invasion. IN this 2 player set, one player uses Rachel's deck and the other player plays Marco's deck. With each turn, you decide whether to move or morph. You Team up with other Animorphs to spy on the enemy. You score points only when your strength and smarts are greater than the Yeerks'. The first player to earn 24 points wins the game and... saves the earth from the evil Yeerks... but only for 24 hours.(Although seemingly marketed as a CCG (back in the days when the first 'C' stood for 'customizable') , the game consisted of two 2-player sets, each a self contained game. There were no boosters.) - BoardGameGeek