Battle Royale is a card game, similar to the children's card game of War but played between one player and a dealer. A regular deck of 52 cards is used, with one card dealt face up to the player, and one card dealt face up to the dealer.

The game is very simple in that whoever has the higher card wins. When it comes to rank, aces are high and twos are low. The game carries on in this fashion until a tie occurs between the dealer and the player.

If this happens, the dealer will ask if the player would like to battle or surrender. If the player chooses to surrender, the dealer takes the bet and deals a new hand. If the player decides to battle, the original wager must be doubled, and cards are then dealt out one by one to the player and to the dealer. If the dealer wins, the doubled wager is lost, but if the player wins, only the original bet is returned. However, if a second tie occurs during the battle the player is payed out at a rate of 7:1.