Roshambo for fun and profit
(or Discordian enlightenment for the masses)
Roshambo is an ancient game frequently used to resolve disputes, and to better understand the universe. If you doubt how a game can be used for this, read 'A Canticle for Liebowitz" by Walter M. Miller, Jr.
Here it is, then. Discordian roshambo. Five symbols, as fits anything dedicated to Eris. The first three symbols are the familiar Rock, Paper and Scissors, but we add Eris and Greyface. Eris, of course, is symbolized by holding all five fingers of the hand splayed out. Greyface is symbolized by making a "Spock" sign with the hand, like paper split down the middle between the second and third fingers.
also see: Discordian Games