mahjong 21The most common being the 3-tile-match mahjong or triple mahjong, and 3D mahjong. 3-tile match Triple Mahjong - This has the same rules as Mahjong solitaire regarding free tiles thatMahjong Titans. The orinal challenging version is back! If you would prefer to play the easier version that was featured here recently you can still find that by clicking this link: Mahjong