Tetran
Tetran (Noun) is the unofficial term for a hardcore Tetris player, an average Tetran will own either the NES or GameBoy versions of the game (Sometimes both). Under most circumstances Tetrans can normally hum most, if not all of the Tetris theme song, or they can play it on an some kind of musical instrument.
Joe: Hey Bob, did you hear that John has two versions of Tetris?
Bob: Really? Wow, that guy is such a Tetran.
Bob: Really? Wow, that guy is such a Tetran.