It's a twist on Guess Who? gameplay with cards In this version of the Guess Who? game, players lay out their Character cards in front of them and choose a Mystery Character from the Mystery deck. Then each player asks their opponent a yes or no question, and the answer gets them closer to who's on their opponent's Mystery card. When they think they know who their opponent's Mystery Character is, players make a guess. A correct guess makes that player the winner. If they guess incorrectly, that player loses the game This quick-playing card game is a convenient way to let your kids take the Guess Who? game with them when traveling or visiting a friend's house.