Pyramid, already a clever game, is elegant because the Winner’s Circle round is not merely an exciting bonus round, but a built-up tapering of the prior round. In the earlier round, clues must be given for things in a category to be guessed. In the later round, things must be given for a category to be guessed.
There are 2 types of gameshows: Those I know from GSN, and those I admit to watching.