PetCraft 3D is a large cross-chain blockchain game. We call it a World Creation Game, which brings love and hatred into national wars. It builds an ever-expanding planet, enabling plenty of gameplays like pet mining, battle, strategic competition, far more than a simulation game. Furthermore, the exploration of the world map is related to the game development by players. Besides, the game has introduced famous IP and the like to help building an animal-friendly society.