Terms of service Mahjong is a traditional game established in China about 100 years ago. Classic mahjong was played with 144 mahjong tiles and four players. It is a social game that allows friends and family to get together and have fun. The online mahjong rules are simple — match identical mahjong tiles that are not covered, and free from sides. Any special tiles such as flower tiles and season tiles can be matched. You can learn more about scoring and how to play mahjong by clicking the question mark in the upper-right corner of the mahjong games. You will want to challenge yourself by matching the tiles quickly because the game is timed. Best of all: You can play mahjong online best casino bonus codes — no download needed! Terms of Service The goal of 21 is to amount your card values as near to 21 as possible without exceeding or 'busting' it. Moreover, you have to beat whatever hand both the dealer and other players have drawn; if they have 20 and you have 19, you lose the hand.