Tetris (Electronika 60)

Tetris for the Electronika 60, the original creation which Alexey Pajitnov programmed in Pascal on an Electronika 60 computer, features black and white graphics, with a pair of brackets representing each block in a tetromino. A player controls input through the number pad and carets/vertical lines outlining the playfield.

There is absolutely no trace of this anywhere online at all.