"Cook81 Mahjong" is a Mahjong game which is using Cook81 characters. You can play the game with opponents on the network in 2 or 4 players. If there are no opponents to play with, you can play the game with the computer. a game continues rounds until all players plays the dealer.

you get 11 tiles including the tile you PON. you discard the tile that you don't need, and draw (TSUMO) a new tile until you make a set of tiles. basically, if you make a 3/3/3/2 set of tiles, you can win (TSUMO, RON) the round. according to the types of the tiles, points that you get changes. →how to win a round

if you exit the game after the game started, for example, by closing your browser, your ranking point will automatically decrease. →if you exit while playing.