You Don't Know Jack is a trivia game that uses elements of pop culture to ask entertaining trivia questions to the players. The game is structured like a television game show.
A player chooses the question's category and then the question number is presented in an amusing song/animation of the question number before asking the question. Questions are read aloud by a host and players must buzz in to choose one of the 4 answers. Correct answers earn (virtual) cash and incorrect answers lose cash.
There are two rounds of regular questions, with the second round's questions being worth more money. A third round called the Jack Attack is then presented where players can earn more money. The winner is the person with the most money at the end of the game.