We used to play this game on another forum.
What you have to do is write something that you have learned about the person above you from their posts on the board.
So, for example, the next person posting might say: Tonyblack lives in Cardiff, Wales.
The next person then has to say something about the person who posted about me - and so on.
If you don't know anything about the person above you, then a quick search of some of their old posts might help.
Let's see how it goes.