Pirates of the Caribbean is a role-playing game in which the player takes the role of a pirate who has to grow in skill by fighting, trading and solving quests. The player can buy and upgrade a ship, sign-up a crew, and try to rule the seas of the Caribbean.
The game was called Sea Dogs 2 up till just a couple months prior to release. Then they changed the name to Pirates to the Caribbean to profit from the popularity of the Disney movie.
However, the game hasn't changed a bit because of this and the game actually has nothing to do with the story or characters from the film, with the exception to the voice over which is one of the actors from the film.