* FanNickname: The pieces are officially called L, J, S, Z, I, O, and T. The S and Z blocks are often called "squigglies", the O is called "square", and the I is called "line piece".
** The fates of the Tengen version of NES ''Tetris'' and the [[SegaGenesis Genesis/Mega Drive]] port of Sega's arcade version of ''Tetris''.
** Beginning in [[TurnOfTheMillennium the 2000's]], the Tetris Company began enforcing guidelines on what a game carrying the ''Tetris'' name should be like, such as exact playfield dimensions, piece colors, and piece behavior, especially piece rotations. This proved to be a problem for developers like Arika that have their own ideas on ''Tetris'' games.
* KeepCirculatingTheTapes: As the years went on that led the Tetris Company having a stronger oversight over licensed Tetris games and the consumer markets preferring digital storefronts over retail stores, it's become common to see when newer releases of Tetris games come out, older releases go out of print at retail stores and are pulled from digital storefronts. Want UsefulNotes/GameBoy ''Tetris''? It's no longer available legally outside used game sales.
* KillerApp: This game ''made'' the GameBoy, and it was packed in with the system for years.
** Most versions based on Sega's original arcade version.
** ''Tetris 64''.
* PortOverdosed: Arguably the most widely-ported game in history. It is said that if you can program it, someone has made a version of ''Tetris'' for it, up to and including the sides of buildings.