The most important part of a game world is the story that is behind it and that holds it together. When creating a game world it is often the best idea to start by creating a story for the world and then building around it, or for instance, if you have some landmarks already set out, place them down and then continue to build the world around it and connect all your world together so it flows seamlessly. Within your game world, there should be regions and realms and they should all be different from each other just like how we are surrounded by different counties and everyone is different. Within your game, there should be different races and types of people so it will feel like a fully functioning world.
