For a relatively simple game, Jury box (published in 1936 by Parker Brothers) has earned itself a spot in game history.
It’s a game for any number of players, and is relatively simple. You (and your fellow players) act as jury to the cases provided in the box. There is photo evidence, an illustrated case file, and what the “correct” answer.
In play, after the case is read by a selected player, the players write their verdict and idea of what happened: points are awarded to those with the correct verdict, and to those whose solution behind what happened comes closest. The person with the most points after all the cases are complete wins.
Jury Box is the precursor to modern variations of LARP and murder mystery games.
The action of pretending to be a person, and the whodunnit nature of the game is what lead to the evolution of games like Clue and such.