Mau is a card game for two or more people played with one or more decks of regular playing cards. It is similar to Crazy Eights, and even more like Uno. Intro. Mao is the greatest card game in existence. To play Mao, you need a group of awesome people and one deck of cards per people in the group (a. This game is much like UNO. If you keep this in mind it "The dealing of the untraditional five card Mao now begins to the dealers left." The cards are dealt.