TranquilityNumber of Players: 1 5 Jump on board the good ship Tranquility and set sail for paradise. Take care, though, because in a land where the day blends into night it's easy to lose track of time and you still need to find that special little island to call home. Tranquility is a co operative card game in which players must fill the sea with islands specifically island cards with numbers on them and guide the ship home before any player runs out of cards.