For literally weeks, people all across the globe having been playing 'Rock, Paper, Scissors, Lizard, Spock', the vastly superior alternative to the classic, yet limited, 'Rock, Paper, Scissors' game - as popularised by Sheldon Cooper.
So how does it work?
Well, much in the same way as the classic game, only with a little more to remember. Each player, on the count of three, must extend their hand in a shape corresponding to one of the five moves.
These are: Rock, Paper, Scissors, Lizard and Spock.

The winner of each round is the player whose move 'beats' the other player's. The possible outcomes are:
Scissors cuts Paper
Paper covers Rock
Rock crushes Scissors
Rock crushes Lizard
Lizard poisons Spock
Spock smashes Scissors
Scissors decapitates Lizard
Lizard eats Paper
Paper disproves Spock
Spock vaporises Rock
The winner is the first player to win a pre-decided number of rounds - usually the best out of three.
Enjoy.