Half-Life 2 crowbars its way out of Linux beta@ 2013/06/28
That's not all! Oculus Rift (and other virtual reality device) support has been added as well. We aren't aware of any other VR units besides the Rift, but in March Valve told us it's pursuing hardware itself. Speculating about other VR systems isn't far from speculating about Half-Life 3's existence -- we don't know anything at this point. However, Linux gaming site Phoronix says to expect more good Valve Linux news in July. We reached out to Valve for more info and will update if we hear anything back.