Tetris is a classic and so there are many versions available to play, all with slightly different takes on the strategy game. Some are lame, some are good. This Tetris Link game is the latest and it looks fun.
Think of it as a cross between Tetris and Connect 4. You can earn points by connecting your Tetriminos while blocking your opponents from linking their colors together. Pretty simple and it sounds fun. 2-4 players can play.
A great new take on a classic for just $27.99 from Thinkgeek.