I'll tell you what, how about we go 'Rock-Paper-Scissors'? –Ew, I don't think so. No. Anecdotal evidence suggests that in a game of 'Rock-Paper-Scissors', players familiar with each other will tie 75 to 80% of the time due to the limited number of outcomes. I suggest 'Rock-Paper-Scissors-Lizard-Spock'. –What? –Oh, it's very simple. Look, Scissors cuts Paper. Paper covers Rock. Rock crushes Lizard. Lizard poisons Spock. Spock smashes Scissors. Scissors decapitates Lizard. Lizard eats Paper. Paper disproves Spock. Spock vaporizes Rock. And as it always has, Rock crushes Scissors.