Kingston is the first area you fight in The First Descendant after finishing the tutorial. Despite its small size, the devs lock a large chunk of it behind the game’s progression system.
The biggest part is the Grand Square, which is walled-off until players meet certain criteria to unlock it. If you try to head there early, you’ll be told you can’t enter until you become a better player, which is a cheeky way to tell you you’re going the wrong way.