Steam VR Documentation and Download link SteamVR is a suite of tools and services for VR including OpenVR, Chaperone, Compositor, Lighthouse Tracking, and more. OpenVR Documentation and download links. The OpenVR API provides a game with a way to interact with Virtual Reality displays without relying on a specific hardware vendor's SDK. It can be updated independently of the game to add support for new hardware or software updates. The API is implemented as a set of C++ interface classes full of pure virtual functions. When an application initializes the system it will return the interface that matches the header in the SDK used by that application. Once a version of an interface is published, it will be supported in all future versions, so the application will not need to update to a new SDK to move forward to new hardware and other features.