Some years ago, Walt Freitag, a LARP pioneer, published a short game in a LARP zine, called The Files, Mr. Freitag. He described it as "a game for gamemasters," and it works like this: one of two players begins by saying "The files, Mr. Freitag." The other responds. They must take what each say as established, building a sense of character and setting over time -- both characters may lie, so what is said may not be literally true, but must be accepted in some sense. The dialog continues until some resolution is reached.