It's the same as playing Tetris, except that there are two players simultaneously. The two of you must work together to clear lines and get the highest score possible.
AnyPLAY is a generic network card game. The game does not enforce any rules. Instead, the players are relied upon to keep whatever rules they agree upon. This allows the players to play nearly any card game over the Internet.
Quack game is a polished tetris clone featuring nice graphics, music and sound. With so many tetris clones, why choose Quack? That's easy - a cute little duck watches you play and quacks whenever you clear a line.