Instructions
Pick a Chooser from the group; everybody else will be Guessers. The Chooser picks a famous person (or a non-famous one all of the players are familiar with) known as an Identity. It's important that the Chooser be familiar with the details of this person's life. The Chooser then tells the Guessers the first letter of the Identity's last name.
Decide which Guesser will go first and let them ask a yes/no question relating to any famous person that has the same first letter in their last name. If the Chooser is able to answer the question, play goes to the next Guesser. If the Chooser can't answer it then the Guesser can ask a specific yes/no question about the subject. Play continues in this manner until the person is guessed or the Guessers give up.
Play the game like this example. The Chooser picks the person and tells the Guessers that the letter is "B." The first Guesser asks "Is the person a musician?" and the Chooser says "No, it's not Count Basie" and play moves to the next Guesser. The next Guesser asks "Is the person a famous inventor?" but the Chooser can't think of an inventor whose name begins with a "B" so his gives up. The Guesser then says "I was thinking of Laszlo Biro" and asks their specific question about the Identity, such as "Is the person male?" Play then goes to the next Guesser. If a guesser thinks he knows who the person is, he will say "Is the person Tony Blair?" If he is correct then he becomes the next Chooser; if not, then play moves to the next Guesser.
Answer the Guessers with any person that you can think of when you are the Chooser, even if it isn't what they are thinking of. As long as your answer fits the question then play can continue, the Guesser can always ask the question again, forcing you to come up with a new name.