What are some alternatives?
Good Old Tetris - Play Tetris Online. The game that will never get old.
Tetris Blitz - Race against the clock in a two-minute blitz to clear lines and rack up points before time runs out.
PureBlocks - PureBlocks is a minimalist falling blocks game for those who simply want to play.
Tetris Online Poland - Tetris Online Poland (TOP) is an online tetris game where you can play tetris with your friends and tetris experts from all over the world.