Sea of Thieves is an action-adventure game developed by Rare and published by Microsoft Studios. Released in March 2018 for Xbox One, it offers a multiplayer pirate experience where players explore an open world, assume different pirate roles, and embark on quests to find treasure and become legendary pirates. Players can sail ships, engage in naval combat, and discover islands filled with puzzles, enemies, and treasure. It's known for its cartoony graphics, shared-world gameplay, and regular content updates that have continued to expand the game's universe.