Enable Oculus Rift DK2 Support for Half-Life 2 and SteamVR
Valve has been an early supporter of Oculus VR and virtual reality. Their popular shooterTeam Fortress 2 (2007) was one of the first existing games to be updated with Oculus Rift support.
In January, 2014, Valve released a beta version of SteamVR, a mode for the company’s massively popular Steam game distribution client that allows it to be viewed in a virtual reality version of ‘Big Picture Mode’.
Not sure how I missed posting this as I do remember reading the RoadtoVR article at the time. Basically, if you’re having any issues at all running Half Life 2 on your shiny new Rift DK2 then this is the article you need to turn to.