Guess Who? is a two-player guessing board game that originated in the United Kingdom in 1979. The object of the game is to guess who the other player's character is by asking questions that can only be answered by "yes" or "no". When a question is answered (such as "is your character blonde") the player will flip down all the characters that do or do not follow the question depending on the answer (if it's "no", the character puts down all the characters that are blonde, etc.)