The first step to getting your Oculus Rift working with SteamVR is actually to make sure your Rift is installed and working correctly. How to Play SteamVR Games on Oculus Rift in 4 Steps 1.
Although Valve is working closely with HTC to promote the Vive as the flagship headset for the platform, Steam VR also supports the consumer Oculus Rift and even the older Rift DK2 development kit. Valve wants Steam and SteamVR to be the VR content destination of all VR headsets. See Also: Oculus Rift Review – Prologue to a New Reality In a few quick steps you can use your Oculus Rift to play Steam and SteamVR games.
Although Valve is now prompting Rift users to install SteamVR, there’s more steps to actually get the Oculus Rift working with Steam.