To find out whether you need to use Oculus or SteamVR you can go into the game's [GameName]_Data>Plugins>x86_64 folder
If you see:
- OpenVR --- requires SteamVR
- OVR -- requires Oculus
- OpenXR -- works on either, but will start whichever you have set as your active OpenXR runtime
Cheers!
