Another SweViver video, this time with Half-Life in VR. Instructions for setup are below the video. Looks as though it still has some issues to sort out but still very playable. Worth a go with a high res texture pack, not that Half-Life needs a reason for another visit.
Video - https://youtu.be/c2wCIyCaxUA
Video - https://youtu.be/c2wCIyCaxUA