We wondered why we kept seeing the almost intelligible Google logo of late, until we realized it was in honor of 25 years of the puzzle game. If you were one of those who saw it in your head after playing for hours, shame on you. If you weren’t, have your own marathon with the David de Niese’s unlicensed NES Cafe Tengen Tetris. We bet you will get hooked enough to have your own nightmares.