All characters in this amusing game are frauds. They take turns being the narrative focus while the other players act as "board members" at a common archaeology society. On each turn, a character draws (yes, literally draws) some cave drawings and then claims to have discovered them and claims they are true antiquities. Throughout the game characters attempt to win "Back Pats" (e.g., pats on the back) which count as points toward winning.
From the game:
[T]he game is all about forcing the other players to pat you on the back, until you’ve scored more points than the rest of the players and can claim the title of World Class Archaeologist.