What is the fine-grained topic of the following text: In the Game our hero Edward Kenway will visit three main cities; Havana, Kingston, and Nassau, which reside under Spanish, British and pirate influence, Another aspect of the game is the ship the player will captain, Named the Jackdaw.The ship will be upgradeable throughout the game. Only return the topic.
The main cities and ship upgradeability in a game featuring hero Edward Kenway.