”OpenComposite OpenXR (previously known as OpenOVR – OpenVR for OculusVR – but renamed due to confusion with OpenVR) is an implementation of SteamVR’s API – OpenVR, forwarding calls directly to the OpenXR runtime. Think of it as a backwards version of ReVive, for the OpenXR compatible headsets.
This allows you to play SteamVR-based games on an OpenXR compatible headset as though they were native titles, without the use of SteamVR!”