Remember that family sharing option that Microsoft had to take away? Well Valve is bringing it to the PC platform.
Valve has announced they will be offering a Family Share program for Steam. Up to 10 devices can be authorized to borrow your games, which is pretty damn cool. Not all games will be compatible with this service though. I'm guessing some games like Arkham City which require Games for Windows would not apply. But there are plenty of others that you can lend to your family members.
Only one copy of the shared game can be active at a time so no playing the same game if your brother is too.
This is a greal new feature and it just takes Steam and PC gaming to a another level.
Steam Announces Family Sharing
Coming Soon: Players who share computers can also share their Steam games
September 11, 2013 - Steam Family Sharing, a new service feature that allows close friends and family members to share their libraries of Steam games, is coming to Steam, a leading platform for the delivery and management of PC, Mac, and Linux games and software. The feature will become available next week, in limited beta on Steam. Steam Family Sharing is designed for close friends and family members to play one another's Steam games while each earning their own Steam achievements and storing their own saves and application data to the Steam cloud. It's all enabled by authorizing a shared computer. "Our customers have expressed a desire to share their digital games among friends and family members, just as current retail games, books, DVDs, and other physical media can be shared," explained Anna Sweet of Valve. "Family Sharing was created in direct response to these user requests." Once a device is authorized, the lender's library of Steam games becomes available for others on the machine to access, download, and play. Though simultaneous usage of an account's library is not allowed, the lender may always access and play his games at any time. If he decides to start playing when a friend is borrowing one of his games, the friend will be given a few minutes to either purchase the game or quit playing.