In Islebound, you take command of a ship and crew. You sail to island towns, collecting resources, hiring crew, and commissioning buildings for your capital city. Each building has a unique ability, and your combination of buildings can greatly enhance your strength as a trader, builder, or invader. You also recruit pirates and sea monsters to conquer towns, which, once conquered, allow you to complete the town action for free, and charge a fee to opponents if they want to use it. Alternatively, you can complete events that give influence, which can be used to befriend towns.