It has come to my attention that there is a VR game by the title of “Iron Rain” being in production for PC based VR. The developer Black Beach Studios has recently shown off a dev blog video.
The video states that the game is recorded in its pre-Alpha stage, which indicate that there is still a long way to go before its release. The developer has been posting and documenting the progress on TGIForum since last year, and you can head over there for a look. A facebook for the game can be found here. The game is confirmed to be coming to HTC Vive on SteamVR.