Valve may be planning a new feature for digital download service Steam that will allow users to share their game library with friends, according to code spotted in the latest Steam client beta as reported by Kotaku.

Similar to Microsoft's plans for its Xbox One console, the Steam code suggests users will be able to share owned titles but will not allow users to play the shared games at the same time.

"Just so you know, your games are currently in use by %borrower%. Playing now will send %borrower% a notice that it's time to quit," reads a line of code for one dialogue prompt. Another reads: "This shared game is currently unavailable. Please try again later or buy this game for your own library."

Valve is yet to officially announce sharing and it is unknown whether all developers will be required to allow Steam titles to be shared. We have contacted Valve for comment and will update when further information is made available.

Source: http://www.polygon.com/2013/6/19/4444450/steam-could-allow-for-game-sharing-between-friends-in-the-future

Well it is safe to say it would be a welcome addition. 

would be great!

sounds good for swapsies

I want see how this is going to work.

this is what happens when there is healthy competition in the industry. This is a good response from valve to the Xbox one. With Steam being my main pc gaming store, and xbox one being my main console i should be set to play games anywhere easily, and share them with family and friends.

so, i think we won't get it on steam anymore now? damn, would have loved to play metro: last light for free

I think we'll be seeing more and more of this type of thing when everything gets above 80% digital for that respected platform.

Big picture mode sucks. I have no friends on steam so this doesn't affect me :'(

Once again PC master race leads the way, dragged down by console luddites.

Quite true. But consolers don't have anyone to blame by themsleves...