Just an idea I've been mulling over...

Prison Break:  Several players are selected as escaped prisoners.  The story of their escape is open for discussion, but use your imagination.  The escaped prisoner's objective is simple, don't get caught.  Another group of players are selected as the law.  Their objective is not so simple, bring back the prisoners to a designated area...alive.  Still a third group of players are selected as accomplices for the prisoners.  Their objective is to help the prisoners stay out, by whatever means necessary.  Sounds simple enough right?  Wrong.  Each group of players will not know who they are until the reach their assigned location and open individual mission envelopes.  The possiblities are open as to how a winner would be decided, outside of all the prisoners being returned or lawmen killed.  I mean what gets better than cops and robbers...?