For the Cards Against Humanity 2.0, check the International Edition here.
Play begins with a judge, known as the "Card Czar", choosing a black question or fill-in-the-blank card from the top of the deck and showing it to all players. Each player holds a hand of ten white answer cards at the beginning of each round, and passes a card (sometimes two) to the Card Czar, face-down, representing their answer to the question on the card. The card czar determines which answer card(s) are funniest in the context of the question or fill-in-the-blank card. The player who submitted the chosen card(s) is given the question card to represent an "Awesome Point", and then the player to the left of the new Card Czar becomes the new Czar for the next round. Play continues until the players agree to stop, at which point the player with the most Awesome Points is the winner.
From the website:
"Cards Against Humanity is distributed under a Creative Commons Attribution-Noncommercial-Share Alike license - that means you can use and remix the game for free, but you can't sell it. Feel free to contact us at email@example.com."