The waters have been somewhat calm in Rare’s Sea of Thieves, but pirate ships and a wealth of new content should bring violent waves when the game’s biggest update yet hits on July 31 for free. These new additions will be introduced in a new three-week-long campaign called Cursed Sails. This time-limited story pits you against A.I.-controlled skeleton ships that are terrorizing outputs and pirates on the high seas.

To combat this new threat, players can set sail in a new three-player Brigantine ship, and even work with other players to gain bigger rewards through alliances. If you get deep into this story, and want to know where the origin of the skeletons, you can take on a new sidequest. If you arrive to the part after the three-week campaign ends, you’ll only miss the story. All of the content that comes from it will remain in the game.

You can take a look at what the Cursed Sails brings in the video below.

For more on the update, you read our E3 interview with Rare where we talked about what’s next for Sea of Thieves. You can also read our Sea of Thieves review here.

Skeleton Ships Coming To Sea Of Thieves On July 31 In Free Update