This game has been played in thousands of classrooms for hundreds of purposes in many different subjects areas. 
This time, I am using it in Spanish class to practice the verb form "eres" (you are). I'll get reps in of many other second-person structures, but we are targeting 'eres'.
- Have students pick a famous person or character--sports or political figure, actor or actress, singer, cartoon character, character from a movie, etc.
- Have the students write at least five descriptive sentences about that person in the second-person verb form. They should include a mix of general and specific things, like "You are a man" and "You play for the NY Giants". Alternatively, you could have the students complete the form that I created for this game, so that you get enough specific information from each student: Quién soy. The first page is in Spanish, and the second page is in English.
- Collect all of the descriptions and (optional) edit/combine/add to them.
- Have one student come to the front of the room and stand facing the class. He or she may not turn around to look at the board.
- Write (or project) the name of the person/character on the board, along with the most general clue about them (ex: you are a person, or you are a man). I prepare slides overnight. If you would like to use mine, you can download 21 slides in Spanish here.
- Give students some think time, then call on someone from the class (I pull a popsicle stick with one of my students' names on it from a jar) to read the clue to the person at the front of the room.
- After the clue is read, the student at the front of the room has a chance to guess who s/he thinks that s/he is.
- Continue revealing ever-more-specific clues and allowing the student to guess his/her identity until he or she guesses correctly.
- Choose a new student to come to the front of the room and repeat the activity.
