卑怯なコウモリ (Cowardly Bat)

Hikyō na kōmori ("Cowardly Bat") is a card game of bluffing in which players try to piggy-back on other players' cards to score the most points.

All cards are dealt to the players. Each round players take turns playing a card on the table one by one and announce whether it is a Beast or a Bird. Cards may be played face up or face down, and players are free to lie about the card they have played. After each player has a card on the table, face-down cards are revealed and the outcome of the round is determined:

 If all cards are the same type: Everyone wins a point.
 If cards are of two types, then if there are only Beasts and Birds, the side with the most cards wins a point. If, however, there are Bats and anything else, the side that is not the Bats wins a point.
 If cards are of all three types, then if there is a majority of Beasts or Birds, the side with the most cards and the Bats get a point. Otherwise if the number of Beasts and Birds is the same, they all get a point and the Bats get nothing.

Play continues until players run out of cards. The player with the most points wins.