Seven is a set collecting game based on 7 sets of 7 cards, 17 special cards, and 4 Jokers.
Seven is turn-based and everybody starts with 10 cards each at the beginning.
The rest of the cards are placed face-down in a pile on the table and every player must pick up a card at the end of their turn.
The objective is simply to collect as many of the seven sets as you can. You can collect sets by asking other players for cards during your turn.
There are 17 special cards (marked with gold and black stars) and 14 of them have good functions that can give you an advantage in the game. The other 3 are negative and it's simply bad luck if you encounter one.
The Jokers enable you to lie once when another player asks you for a card.