Rock, Paper, Scissors, Lizard, Spock

Rock, Paper, Scissors, Lizard, Spock is a game played by the guys in The Big Bang Theory. It is first used to settle a dispute about what to watch on TV between Sheldon and Raj in The Lizard Spock Expansion. It is mentioned again in The Euclid Alternative and The Rothman Disintegration, where Sheldon explaines the rules to Penny and Barry Kripke respectively.

Rules:
The game is an expansion on the game Rock, Paper, Scissors. Each player picks a variable and reveals it at the same time. The winner is the one who defeats the others. In a tie the process is repeated until a winner is found.
 * Scissors cuts Paper
 * Paper crushes Rock
 * Rock crushes Lizard
 * Lizard Poisons Spock
 * Spock smashes Scissors
 * Scissors decapitates Lizard
 * Lizard eats Paper
 * Paper disproves Spock
 * Spock vapourises Rock
 * Rock crushes Scissors