One for the would-be world rulers. Run a fictitious country entirely as you wish, but watch out for assassination attempts, army coups and revolting peasants (in both senses!).
A text-only format allows a mass of information to be thrown to the screen and provides you with plenty of decisions to make - and to get wrong.
Your popularity rating with each sector of the population is displayed and if it falls too low in one year, the farms will yield you just so much food - but if you get to feel bogged down you can always raise an army and go beat up your neighbours!
Great fun in its own way and will probably teach you a thing or two about youself that you didn't really want to know! About the only sure way to win is to kill off any opposition and run your spending close to the limits. Build up secret police, but watch out for the army if it gets too strong!
The instructions need to be better explained, and longer. Supplying an unlabelled cassette may be cheaper, but it is a recipe for disgruntled customers, should tapes get mixed up at home.