6tris

"Tetris wasn't invented; it was discovered".

Originally released in 1994 and updated two years later as 6tris++, the game is a tetris clone that features some unique features, most notably multiple six player modes.

You can either play six separate games simultaneously or battle it out in two different game modes; in "all against all"-mode whenever you get two lines or more, they are passed to all the other players and in "Against Locals", the rows are passed to the players next to you.