Casino War is a simple card game played against the dealer. Each player and the dealer receive one card, and the higher card wins. If both cards tie, players can choose to either "go to war" by doubling their bet or surrender half their wager. In a war, each player and the dealer draw three additional cards, and the higher total wins. If the dealer wins the war, players lose their original bet. The game is fast-paced and easy to understand, making it a popular choice for both new and experienced gamblers.