The game of Blackjack is largely the same in Hong Kong mobile casinos as it is at any other casino. People can choose to play against the house or against other players. The basics of the game are that each player is given two cards and must try to get as close to 21 as possible without going over.
The main goal of blackjack is to beat the dealer, not necessarily to get 21 as the closest to 21 is the winner. If the player's cards add up to 21, this is referred to as a “blackjack” and it automatically beats the dealer, regardless of the dealer's total. If both the player and the dealer have the same total, it is considered a tie and the player's bet is returned.
In mobile casinos, the rules of the game can vary a little bit from the regular rules, so it is important to check the rules before starting a game.