In the same way that digital book lending has become a feature among various different services, Steam will soon allow you to share your games library with your family.
From a simple game to a first-rate franchise title, Valve would allow you to share the game to up to 10 different devices, with just one true limitation: only a single user can use the library. Also, games with 3rd-party keys and monthly subscriptions won’t be possible.
So if you’re in the middle of that Rome II campaign and someone wants to try Arma III, they’ll have just a few moments. It will be available in limited beta next week.