Play real four-player mahjong — Chinese, Japanese, American, Taiwanese and Sichuan rulesets.
Play real four-player mahjong against three opponents. Hong Kong Old Style scoring, free, no download.
Chinese Official (MCR) mahjong with the eight-point minimum — the international tournament ruleset.
Japanese Riichi mahjong against three opponents. The ruleset behind the modern competitive scene.
American Mahjong with Charleston, Jokers, Flowers, and card-based winning patterns.
Taiwanese 16-tile Mahjong with Flower replacement and Tai-based scoring.
Sichuan Blood Battle Mahjong with Exchange Three, a forbidden suit, and continued play after the first win.