Card Stories provides a server for a networked guessing game using picture cards. One player (the "author") starts the game by choosing a card, picking a word or a sentence to describe it, and sending out invitations to others to participate. Each of these players receives seven cards and has to pick one that best matches the author's description. Once enough players have chosen a card, the author displays all chosen cards and the players try to figure out which one is the author's. If at least one but not all of them guesses correctly, the author wins, along with the players who guessed correctly. Otherwise, the guessers all win.