I suggest Rock, Paper, Scissors, Lizard, Spock.

- Anecdotal evidence suggests that in the game

Rock, Paper, Scissors

players familiar with each other will tie 75 to 80 percent of the time..

due to the limited number of outcomes.

I suggest

Rock, Paper, Scissors, Lizard, Spock.

- It's very simple.

Scissors cuts paper, paper covers rock,

Rock crushes lizard,

Lizard poisons Spock,

Spock smashs scissors,

Scissors decapitates lizard,

Lizard eats paper,

Paper disporves Spock,

Spock vaporizes rock,

and as it always has, rock crushes scissors.

<The Big Bang Theory, s02ep8, The Lizard-Spock expansion>