Lunar is a quick-playing, trick-taking game for two or four players in which players combine the phases of the moon and nocturnal animals to form cards played into tricks, which are combined to determine their value within each trick.

Each round consists of twelve tricks played, and at the end of each round, a score is awarded based on the number of tricks and cards acquired. Once one player (or team) reaches 30 points, the game ends, and the side with the most points wins!