It is a good game, I think just about everyone would have played it in there life at some point. I remember when I got my first gameboy when I was little I use to play it, then when I got my first phone I used to play it on there as well, such a classic.
Some tetris history. One of my friends claims that before Tetris came out there was already a similar game called block game or something. :shifteyes: Whatever that was, it didn't really gain popularity I suppose, haha.