Rock Paper Scissors.

Play Rock-Scissors-Paper on your iOS Device. You can either play with one or two devices.
Rock–scissors-paper is a zero-sum hand game usually played between two people. The game has only two possible outcomes other than a tie: a player who has rock will beat another player who has scissors ("rock crushes scissors") but will lose to one who has paper ("paper covers rock");a paper will lose to scissors ("scissors cut paper"). If both players have the same object, the game is tied and is usually immediately replayed to break the tie.