"harbor blockchain game" is a Free-to-play and Play-and-earn NFT idle game. The game is inspired by multiple expeditions on the sea during the Middle Ages, featuring abundant antiquated resources and ships. By those in-game items, players can commence stimulating voyages to hunt treasures as well as engage each other in fierce aquatic battles. Another interesting point is that the game is integrated with auto-play and free-play mechanisms. By which, players can attain real-world rewards and immerse themselves in the in-game aquatic world without spending much time, effort, and money.