ColorTetris is a little more than just Tetris. It also includes Pentix, a popular variation of Tetris that's more complicated and more interesting, ColorTetris, SuperTetris. There are also many block sets to play. You can use your own sound effects if you like, but the preset sounds will not disturb you while you play. The Background grid can also be changed to your liking. Outstanding graphic and wonderful background music will bring you to the world of pleasure and fun, to the world of ColorTetris! In order to use 'WE' Group ColorTetris you must download FREE registration key. You can't redistribute this key or link to this key! But you may link to program page.