Did you know that pretty much all of the Half Life games can now be played in VR, thanks to some unofficial mods?
In order to play in VR, you need to own the original flatscreen Steam games and also own a SteamVR compatible headset.
- HL2
- HL2 Episode 1
HL2 Episode 2
Black Mesa by Crowbar Collective
Once you have installed the games on your PC proper, you can visit the Developers page and add the Mods to your steam library.
For Black Mesa, please follow the video here to see how to install the mod
https://www.youtube.com/watch?v=YWEzatOqQq0
HL2 VR is fantastic. The driving sections will give you HUGE nausea if you're not used to VR though, be warned.