20 Questions is the popular panel game in which the panel ask up to 20 Questions to guess the Person, Place or Thing. This edition should be called 20 Answers because you get 396 cards with 20 answers and the players in turn ask the Reader a number, and from that clue try to guess the answer. For each attempt a chip is paid, when the Guesser gets it correct, the Reader scores the chips paid, the Guesser scores the remainder. So getting it correct early scores you loads, getting it late scores the Reader loads. The board has a scoring track and there is an element of beating the Guesser too.
When Milton Bradley wanted to publish the UK edition, they thought 50% of the subject cards were too American, so they drafted in game designer Eamon Bloomfield to rewrite that missing 50%, more suitable for a British buyer.