http://en.wikipedia.org/wiki/Bamboozle
Not mentioned there, but there was one geek aspect of Bamboozle that I remember. Given that a wrong answer would (at the time I played) send you back to the beginning, it was tempting to try and note down the three-digit page number of the question, to cheat and skip back to the latest question. But the use of the 4 coloured buttons meant that the questions could use page numbers with hex letters in them - e.g. 34F - rendering them impossible to type in with a remote control. Sneaky, but it was a source of pride when I had figured out not only that they used letters, but why they used only A-F.
Also, Bamboozle inspired me to waste many hours making drawings on my (even by then) old BBC Model B's Mode 7 graphics.