A good card game is addictive by nature. It requires a combination of luck and skill that gives you just enough control to feel like you're accomplishing a win and just enough chaos to keep it exciting. Catch-21 by GSN is just such a game.
If you're familiar with Blackjack, you know the object is to get to 21 by adding up the numbers of cards you are dealt. The element of control comes when you are able to decide whether you want another card or you want to stop and see what luck would have in store – how close to 21 you've gotten. Catch-21 gives you even more control and takes even more skill when it takes your row of cards and spreads them out into four rows allowing you to decide where you place the card you are dealt.