2006-11-09 (updated 2013-06-27)
Pieces are made from 4 connected squares in 7 variations and can be rotated 90 degrees as they slowly drop until they hit bottom of 'the bucket' or other squares. Fill in all 10 squares in a row to make it vanish for points. Completing 2 or 3 rows at once results in bonus points. Completing 4 rows at once is called a 'tetris' and scores the most.
In this version of the game, 2 players can compete or cooperate in separate buckets or the same bucket. Also, AI players are provided for all 2 player modes. This version also has Russian music and dancers.
Enter the Konami code to change any piece to an I brick (the 'straight line' piece). This works while the game is paused. It only works once per game.

Trivia:
It is widely assumed in North America that 'TETЯIS', with the backwards 'R' (Cyrillic letter 'Ya') is the Russian spelling of the title. But this was simply faux Cyrillic typography. The correct Cyrillic is ТЕТРИС (ТЕТРИІС). Some packaging is shown ТЕТРИ☭, with the Cyrillic (Ukrainian) 'І' crossing a backwards 'С' to form a backwards ☭ (Unicode U+262D, ). Otherwise known as the hammer and sickle (Сърп и чук), A symbol of communism made famous on the Soviet flag.

According to a Tengen programmer, 200,000 unsold cartridges were "landfilled" after Nintendo sued Tengen.