It's Rock Paper Scissors Lizard Spock, as popularised by The Big Bang Theory! The rules are in the main menu. NOTE: Don't look at the keyboard for multiplayer so you can have a fair game! I know it's stupid remembering what keys match which weapons, but I only did it so that I could add local multiplayer. Player One Controls (Numpad keys) 1 is Rock, 2 is Paper, 3 is Scissors, 4 is Lizard, 5 is Spock Player Two Controls in multiplayer (lower letter keys) C is Rock, V is Paper, B is Scissors, N is Lizard, M is Spock
The picture for the rules is from Wikipedia. The song is called Music To Delight. It's from Kevin Macleod. The weird rule description is from The Big Bang Theory.
