The game card has the "password" at the bottom, and twelve clues. So for the password "Silver" you might get dollar, screen, medal, lining, et al. Representative for the Red Team gives a clue that is least likely to help his opponent on the Blue Team to guess the password. If unguessed, guy on Blue Team gives a clue to guesser on Red Team, and it goes back and forth until somebody guesses the word in the magic cellophane viewfinder window and wins the point.
It's no Perplexus, but I look forward to trying it out.