As with any multiplayer game that's been around for a while, Sea of Thieves has changed a lot over the years. Rare has made sure to add plenty of new content for fans of its seafaring action-adventure game to enjoy, whether it's new core storylines or elaborate crossovers with IPs like Pirates of the Caribbean. Of course, Rare has removed content from Sea of Thieves over the years. The latest victim of change in Sea of Thieves is Arena, a PvP mode that allowed players to jump right into multiplayer action, rather than seeking each other out at sea. Arena will leave Sea of Thieves on March 10 with the start of Season 6.