Ok the idea is to pick a town or area (larger map for more players) choose someone to be "it" and everyone else hide withen the area. The person who is "it" has to tape a price of paper over his/her mini-map and try to find all the other players. Presumably by right clicking every random civilian in the area.
It might be a good idea to bring a few "costumes" to help blend in with the crowd.
Whoever is found last gets to be "it" next round.