Players compose conspiracy theories from the "Them" and "What" cards in their hands and vote to determine which one they like best.
Each round is started by the player holding the "Lanceur d'Alerte" card (= first player card) and begins with each player having 3 "Them" and 3 "What" cards. Players cannot vote for themselves during voting.
On each round, the player who received the most votes will score as much victory points ("points de Sachoir") as the number of cards used to compose his/her conspiracy theory. If a player reaches 10 or more "points de Sachoir", the game ends and he/she is the winner. Else the "Lanceur d'Alerte" card is given to the next player and a new round begins.
The game offers 4 game modes (or Research Methods): Toutélié - Did you know? - As by Chance! - I know, you believe ...
At the start of the game, you can choose which Research Method you prefer or use certain Research Methods cards to play with them during the game.
—description from publisher