Damn, you are correct, I could've sworn I played them through steam VR but my memory isn't that great these days. Wonder if pirating them and adding them into steam as a 3rd party title is possible.

I'm blown away that no one has mentioned lone echo 1 and 2. IMO they are the crown jewel of the best use of the VR medium for immersive gameplay and story telling, surpassing even half life alyx.