To get started with VR development, Unity recommends using XR Management to load and manage your target platform SDKs. For instructions on how to configure your Project using the XR Plug-in Management system, see the Configuring your unity Project for XR page.
Please refer to Google’s VR SDK Quickstart guide for the latest on Google Daydream and Cardboard. For more information about the Google Cardboard Unity XR Plug-in, see Quickstart for Google Cardboard for Unity.
Valve has released their OpenVR Unity XR Plug-in (beta). See the OpenVR Unity XR GitHub repository for documentation and installation instructions.
Unity’s XR Interaction Toolkit enables you to add interactivity to your VR applications, without having to code the interactions from scratch. It works with Unity supported XR plug-ins and is available as a Preview package for Unity 2019.3 via the Package Manager.