Caylus is a stategic and economic board game for up to 5 players, soon available on the iPhone, iPod Touch and iPad. The year is 1289, King Philip the Fair decided to have a new castle built. Each player embodies master builder and faces his opponents controlled by other human or AI players. By building the King's castle and developing the city around it, they earn prestige points and gain the King's favour. When the castle is finished, the player who has earned the most prestige wins the game.