The idea of the game is to collect treasure to a total value of 20 points. A player may obtain treasure by three methods: 1) Sailing to Treasure Island and turning up Chance cards. 2) Sailing to other ports and trading. 3) By attacking other ships at sea. A notable feature of this game are the very nice treasure pieces. The diamonds, rubies and pearls look like small jewels. The way cards work for ship movement and combat is a very clever mechanic, years ahead of its time.