"Mousquetaires du Roy" is based on the novel "The three Musketeers" from Alexandre Dumas.
The Musketeers (a team of one to four players) are fighting against Milady to find the Queen's pendants before end of the game. Meanwhile, they also have to defeat the plots in several places (Le Louvre, La Rochelle...).
A turn begins with Milady playing plots/cards, and program secretly a destination.
Then, each musketeer (D'Artagnan, Portos, Aramis or Athos) has 3/4 actions to perform amongst: move, draw a card, get equipments, exchange cards/equipments, do a challenge in one of his 4 characteristics, perform a fight against one of Richelieu's guards, reinforce La Rochelle... Milady can reveal herself and send Rochefort to fight the Musketeers.
The game also includes rules for an AI-controlled Milady and can therefore be played as a pure coop.
One against all, all against one.