The Con Game is designed to be played throughout a game convention. Each player has ten cards with a symbol (rock, paper, or scissors) and a number (1 through 10). When encountering another player, the two players can fight or trade. If fighting, a traditional game of Rock, Paper, Scissors using the cards, with ties being null outcomes. Either player can decline a subsequent fight. If trading, each player can reveal as much or as little information as desired, but must be truthful, before making a trade. There are no limits on the number of trades allowed. At the end of the convention, the player with the greatest numerical value of cards wins.
The Con Game was originally designed for JohnCon 2000 and was printed on the convention t-shirt. It is included in Chief Herman's Holiday Fun Pack.