As a huge fan of Tetris, I can't believe I haven't heard of Tetris 64 until recently. Despite being in English, the game never made it to America or Europe but stayed in Japan.
The game might look like a standard Tetris version, but it did include super-huge blocks which could change the gamplay up a good bit. Most notably was its 4-player multiplayer mode which was one of the first puzzle games to feature so many players at once. Something of a big-deal back then, but today most Tetris games include 4 player modes.
I don't know how well gamers in Japan liked Tetris 64, but it looks rather intriguing. I really want to try playing a marathon with the mega Tetris blocks. Oh well I guess it will never happen.