You may have played Tetris before, but we're willing to bet you haven't ever played it quite like this before. Prepare for the addiction to start all over again.
The version of Tetris at FirstPersonTetris.com brings a whole new flavor to the classic. When you rotate a block, you also rotate your perspective. Still not hard enough? If you want a real challenge, give Night Mode a try.
Source: First Person Tetris