Game is made for two players, but also has Player vs PC.

Simple Paper, Rock, Scissors game, with basic rules:

Rock crushes scissors,
scissors cut paper,
paper covers rock.

Than there is Paper, Rock, Scissors, Lizard, Spock and the rules are:

Scissors cuts paper,
paper covers rock,
rock crushes lizard,
lizard poisons Spock,
Spock smashes scissors,
scissors decapitates lizard,
lizard eats paper,
paper disproves Spock,
Spock vaporizes rock, and rock crushes scissors.