Sea of Thieves already received a lot of post-launch content this year, and the flow of free content updates is apparently going to continue next year. First of all, a fourth extension called Shrouded Spoils is coming in November, but the pirate game will also get a new competitive mode called The Arena in early 2019.
Announcing #SeaOfThieves: The Arena - a new competitive game mode coming in 2019. Prove your worth in the game's fifth free content update, test your pirating skills against other crews and impress the new Trading Company - the Sea Dogs! Watch the trailer: https://t.co/i0fV8i6ALW
— Sea of Thieves (@SeaOfThieves) November 10, 2018
Rare said during the XO18 livestream that The Arena will be "a whole new way to play the game." Treasure hunting will remain a big part of this new competitive mode, which will also introduce a new trading company called the Sea Dogs. There are not a lot details yet except that first video trailer, but we should learn more about this new free expansion over the coming weeks.