“Stax is a collection of falling blocks games where the object of the game is to keep blocks from reaching the top of the screen, and getting sequences of the same colored blocks to pop those blocks away. ” [Source: Homepage]
Tetrominic Note: GNU/Linux users, please visit the homepage for source packages. As a side-note, Stax got rewritten with a different interface after version 1.13. This one has a nice retro feel to it and deserves to be mentioned.