Sharing

You will receive the blueprint necessary to make the Town Hall after defeating The Tentacle of It found at the bottom of the Slimy Layer.

Town Hall Recipe
 * 10 Wood
 * 30 Shaped Stone Bricks

After crafting the Town Hall speak with the mayor and you are given an option to make your town account wide. This means that other characters on your account will have the option to start with a shared town or a make a new one. Existing characters can also join the shared town by purchasing The Transfer to Account-Town Document from the The Legendary Wizard Soule. Upon agreeing to make your current world account wide you will earn the achievement.