4. Rock Paper Scissors

Rock-paper-scissors is a hand game played by two people. Players simultaneously form one of three shapes with a hand.

Rock, represented by a clenched fist

Paper, represented by an open hand, with the fingers extended and touching, in order to represent a sheet of paper (horizontal/vertical)

Scissors, represented by two fingers extended and separated, sometimes coming together

The "rock" beats scissors, the "scissors" beat paper and, the "paper" beats rock

If both players choose the same gesture, the game is tied and the players throw again. 

The game is sometimes played as "best of three".