One thing not directly touched on in the article concerning Sega: Tetris initially reached widespread popularity in Japan through the arcade version made by Se

One thing not directly touched on in the article concerning Sega: Tetris initially reached widespread popularity in Japan through the arcade version made by Sega, which was released at the end of 1988. It was awarded "best arcade game of the year" by several Japanese magazines. This arcade version featured a 2-player mode and followed what came to be known as the "Sega rotation" ruleset due to restrictions on piece rotations. The Sega version was ported to the newly-released Mega Drive (Genesis) console and was scheduled to be released in early 1989. It was to be the Mega Drive's killer title, but when the release day came, stores did not get any shipments in. It was later discovered that Nintendo had sued Atari over the rights to the game right before the release of the Mega Drive port in Japan (Atari had given the rights to its subsidiary Tengen, who had licensed them to Sega in Japan). Nintendo won, and Sega was left with a huge stock of games that were eventually repurposed or destroyed. The Game Boy version wasn't released until mid-1989 in Japan, and the NES version after that. They became massive hits, but it is less commonly known that they were preceded in popularity by the Sega arcade version. Eventually, the Mega Drive port showed up on a bootleg 2-in-1 cart from China, also featuring Rambo III. Somehow the bootleggers had gotten hold of the ROM. It turns out the Mega Drive port wasn't a very good one. Last year, in honor of this legacy, Sega released an updated port with the Mega Drive Mini.