TETRIS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! that's all I can say.
Pretty much, blocks of different shapes fall from the top of the screen, and you have to match them up. You get points for a horizontal complete row of blocks, and your goal is to kind of make a rectangle so that you can get the most points. This might not sound very fun, but it is. Some people wonder why this game is so addicting, but I really can't explain it. If I had to explain it, I would probably say that its just fun to get high scores in the game and impress your friends when you can play the game really fast. This is a fun game to master, and for some people it can be very difficult.
For others, like me, this game is easy and fun to play. It is kind of a strategy game, because you have to know where to put things ahead of time. What you do early on in the game can ruin you later.
I really don't have much to say about TETRIS, other than it is an amazing game that everyone should get a chance to experience. It is a masterpiece, and an ingenius work of art.