Each person on the account will have one of two roles: adult or child.
At any time, any one member can play Portal 2 and another can play Half-Life.
Wait a second, Valve.

Those are both Valve games!
I see what youve done here.
I suppose they couldnt go picking favourites.
All developer prefs for the previous Steam Family Sharing feature are being brought forward to Steam Families.
There are a few more details in theaccompanying blog post.
Other family members are not impacted.
I enjoy the fact that they specified brother here.
We all know dads furiously googling aimbots as soon as everyones left the room.