Sea of Thieves disappeared from my Xbox PC app library?

Hi Chris, my name is Rodrigo. I'm an Independent Advisor and a member of the Microsoft community and I'd love to assist you today.

I am sorry to hear that.

Please, reset the store and try installing the game again.

To Reset the Store, Press the Windows Key + R > Type WSReset.exe and press Enter.

Close the store and reopen it.

Then, on the Microsoft Store, type your game name: "Sea of Thieves".

Load the game page and click on "Install".

In case it still does not work, the best course of action is to contact Support.

Please, look for the purchase in your Transaction History.

Sign in here: https://account.microsoft.com/billing/orders?period=AllTime&type=All

Then, copy the order number and contact Xbox Support.

Please enter this link: https://support.microsoft.com/home/contact

Then, follow these steps:

Type in your query: "Agent"

Click on Get Help.

Scroll down the page and click on Contact Support.

Select your "Other Products" and "Billing and Account Profile Questions" > Confirm.

Select "Chat with a support agent in your web browser" > Confirm > Start Chat.

I hope this helps.

I no longer have Steam on my computer and I got a refund for Sea of Thieves from Steam so it's not even in my Library. I also uninstalled the Steam version of Sea of Thieves from my computer.

Sea of Thieves is a Play Anywhere title, so as long as you purchased the game digitally, you can redownload it for the PC without having to do anything else. Just look it up on the Microsoft Store app and you should be able to install it from there, or
check your library in that app.

I have tried all of the messages you suggested but sea of thieves doesn't appear to show up in my library as a downloadable game, and there is no way for me to download it while using the xbox app and its companion.

Until this day I didn't know why sea of thieves and state of decay 2 would be gone from my library, thanks for this info.