Cucco 21 is a deck of Il Cucco cards which specializes playing "Cambio". It has some modifications both in the flow of the game and added special power cards.
The goal of the game is same as "Cambio" - getting most number of chips when someone got bankrupted. Everyone holds only one card and you are penalized if your card is the lowest of all. From the start player, counter-clockwise, a player can either change a card with next player (person on your right) or not. Finally, the last player can change his/her card with the top card of the deck, if he/she wishes.
In the first 3 rounds, the loser get penalized 1, 2, or 3 points according to the number of rounds. From the 4th round and on, the loser is out of the play. The last one stands gets all chips in the pot. Then start again from round 1.
There are several cards with special abilities. In cucco 21, some abilities are added and their ranks have been changed.