The Dwarf King (Le Roi des Nains) is a trick-taking game played with a deck comprised of 53 cards: three suits (Dwarves, Goblins and Knights) of thirteen cards each and fourteen special cards. The game also comes with twenty contract tiles.

The game lasts for seven rounds. At the beginning of a round, the dealer randomly draws one special card, reads it to all the players, shuffles it into the deck, then deals the deck out evenly to all players. (The dealer for the first round is the owner of the game; for subsequent rounds, the dealer is the one who took the 5 of Dwarves in the previous round.) The player who gets the 5 of Knights draws a contract tile, reads it, then chooses one of the two scoring rules on it to apply for that round.

The player with the 5 of Goblins leads on the first trick. Players must follow suit if possible, and the game has no trump. The highest card played of the suit led wins the trick and proceeds to the next trick. Once all the cards have been played, players tally their points (possibly negative), remove the special card and contract tile from the game, then shuffle for the next round.

The player who scores the most points over seven rounds wins.