Family Sharing lets up to 10 others play your Steam games — anywhere

Interested in checking out a game on Steam but want to try before you buy? Now a friend can share it with you.

In fact, you won’t even need to buy it at all, since you can play your friend’s game as much as you want while logged into your own Steam account. Steam Family Sharing enables account holders to share their game libraries with up to five relatives and guests on up to 10 devices. First, the person sharing must authorize their guest. Then they can share their library in its entirety (it’s all or nothing) with that person.