At today's Xbox E3 presentation, we got to see footage from tons of awesome games, including Rare's newest title, Sea of Thieves. In the gameplay, we see the co-op multiplayer aspect highlighted a lot, as players work together to search the seas, find loot, and take other player teams down. The game is set to be an open-world MMO, where players can explore, trade, fight, plunder, and generally play together as a pirate crew.

Sea of Thieves will release sometime in 2018, as an Xbox One and PC exclusive.

Source: Microsoft E3 2017 Press Conference