Steam’s Library Sharing feature is known to have some issues, so it’s entirely possible you may be having trouble getting it to work.
You can’t share only specific games, the entire library has to be shared to other accounts.The other user will be prompted to either buy or exit the game. In the event that two users try to play one game, the primary account that owns the game will get priority in playing the game. Two users can’t be playing the same game at the same time.This could be due to the game needing a subscription or third-party account for it to be played.
When using Library Sharing to share games on Steam, there are a few things you’ll want to keep in mind in order to make sure the sharing works smoothly and to limit issues.
This is a handy tool if you ever want to revoke Library Sharing on other devices. If you’ve already authorized your account on another device, you also have the ability to deauthorize it on any other device besides the one you’re currently using it on.
