As a mmo fan I can not wait for this. I think this gameplay is from the last alpha test. 

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Windows 10 Alpha Test

https://www.seaofthieves.com/news/AnnouncingOurWindows10TechnicalAlpha

I've been dying for a game like this. Please be good.

That ship boarding was funny af.

Such a gorgeous man.

Added a link to sign up for the Windows 10 Alpha Test this weekend.

Fighting ships looked fun (if you have friends who want to play with you), everything on the island looked bland and annoying. Talk about a mixed bag.

The gameplay looks really good.

The ship fights looks fun but the actual fighting look pretty bland. The world itself seems a bit bland too. I assume they still got plenty of time till release so hoping the on-foot areas become a bit more engaging

That looked great. Seems like it could be more a Destiny type game than an MMO. Shouldn't need more than a couple friends to enjoy it more.

Looks good but man do I detest and reject this notion that the company "Rare" is somehow associated with the same company that use to work with Nintendo. Those guys all left. Rare is alive only in name. As far as I'm concerned, this game is developed by an entirely different development house.