There are several types of Blackjack games, each with its own variations in rules that can impact strategy and odds. Classic Blackjack is the traditional version played with one to eight decks, where players aim to get as close to 21 as possible without going over. European Blackjack differs by having the dealer receive only one card initially and not revealing their hole card until later, while Atlantic City Blackjack uses eight decks and allows the dealer to check for Blackjack. Vegas Strip Blackjack typically involves four decks and has similar rules to Classic Blackjack, but it allows for late surrender and other player-friendly options. Single Deck Blackjack is played with just one deck, giving players a slight advantage in card counting, while Spanish 21 removes all 10-value cards but offers more favorable player rules. Variants like Blackjack Switch let players switch cards between two hands, and Pontoon, popular in the UK, uses different terminology and rule changes, such as requiring the dealer to hit on 16. Super Fun 21 offers even more flexibility, allowing players to double down on any number of cards and win with six cards totaling 20 or less. The key differences between these variations lie in the number of decks, the dealer's actions, and special rules that affect the gameplay, with some versions being more advantageous for players than others.