Another one for Tetris!
I've just read all the way through the comments and you seem to be the *only* person who's mentioned Tetris!!
A brilliantly simple but incredibly addictive game with nice touches like the little Russian figures in the windows who would applaud you when you completed a level.
They'd also do a little victory dance, but if you hit a button, a hook would come out from the side and snag them around the neck and drag them off! (If you timed it right, they'd duck it the first time, but get caught the second time :-) )