Tetrus 2000: World Championship - description from Softdepia.com:
Tetrus 2000 is a very nice Tetris game. It also includes Pentix, a popular variation of Tetris that's more complicated, game with bombs and four modes of gaming(Classic,Timer,Rising and World Championship). By playing this game you can take part in the Tetrus World Championship in the Internet! There are eight different block sets. Tetrus 2000 has a very comfortable keyboard control. You can change key sensitivity and the background color can also be changed to you liking. You can save your game at any moment.
Tetrus 2000: World Championship is a "Free to try" program. You can download and try it for an evaluation period.