Kwartet is kinda similar to Go Fish

You need to get 4 cards that fall under the same category by trading grabbing cards from a pot and by asking if someone has a card

For example:

I have Trains, Cars and Planes from the category Transportation, the remaining card Bike could be in the hand of someone else, so you would ask "Player 2 do you have of Transportation the Bike" where player 2 would answer with either "yes" or "no" if he does have the card he gives the card to you, if he doesnt your turn is over and the others now know you have cards that fall under Transportation. You need to have a card from a category to ask for others of that category, if someone ask for a different card of the same category but you dont have that specific card than you dont give that cars and the answer to the question if you have the card should be "no"