Nintendo Game Boy (1989) - Despite the Game Gear having a colour screen and the 16-bit Atari Lynx also being more powerful, the Game Boy’s dual-pronged attack of Tetris and Mario, plus a longer battery life than its technically superior rivals thanks to the greenscale screen, meant Nintendo won the first handheld console battle.
Ecstasy Of Order: The Tetris Masters [DVD]  DVD ~ Thor Aackerlund, A documentary about the battle to win the 2010 World Classic Tetris Championship. http://www.amazon.co.uk/dp/B0085X31ZA/ref=cm_sw_r_pi_dp_mwverb1V3X0YW
Tetris Battle Gaiden (テトリス バトル外伝 武闘外伝, Tetorisu Batoru Gaiden Butō Gaiden) is a competitive puzzle-battle game, similar to games such as Puzzle Fighter or Puyo Puyo. One can play against a friend or the Computer in a story mode. There is also an included Rensa mode, which ensures a more hyperactive game due to increased gravity. The player can choose from a list of characters in the story mode, including a Dragon or a pumpkin named Halloween.