>>278146109
Subnautica's VR port is pretty bad, but you if you really like the game you can still have some fun with it.
There's not a VR mod for HL2, but you can load levels through GMod, which does have one. It's supposedly pretty janky though, so I never bothered with it. There's a mod for the original Half-Life now though which I've been meaning to try out.
TF2 probably isn't worth the trouble even if you can still get it working since the VR support was way too basic.