Subscribers to Xbox's Game Pass monthly service are currently unable to play the recently released Sea of Thieves, despite its inclusion in the program.
A posting on the Xbox Live Status page confirms Game Pass subscribers may be unable to play Sea of Thieves, which was including in the service's library of playable games upon its release last week. Microsoft announced earlier this year that all Microsoft Studios games would be included in the Game Pass lineup, including Sea of Thieves and State of Decay 2.
Sea of Thieves Xbox Live Status Page
Source : IGN.com