The rarest card in UNO is the "Wild Draw Four" card. This card allows the player to choose any color and force the next player to draw four cards, but it can only be played if the player does not have any cards of the matching color in their hand.

Joker can also be played at the end of Batman: Arkham Knight and in the middle of Batman: Arkham Origins as Red Hood.

Role in multi-player games\n\n Euchre, 500: As the highest trump or "top Bower". Canasta: The Joker, like the deuce, is a wild card. However, the Joker is worth fifty points in melding, as opposed to twenty for the deuce. Gin Rummy: a wild card, able to be used as any necessary rank or suit to complete a meld.