Sirtet puts a new twist on Tetris - Time-Waster
If you're familiar with Tetris, you should have no trouble catching onto Sirtet. The object is to position your blocks so that you have 4 (but no more than 4) squares of a single color touching one another. Instead of building lines, as in Tetris, you're building Tetris pieces! When you connect 4, those blocks disappear and you get points. If you connect 5 or more, though, they turn to stone and become stuck on the board. That definitely adds a new level of challenge to the game, If you're a Tetris junkie, and the original version has gotten stale for you, give Sirtet a whirl.
[via Ironic Sans]