I picked up Subnautica on sale from Oculus Home (awesome game, btw!) and
after a few days it just stopped working. If I launch normally, the game
fires up, but I can't select anything from the home menu. The scene is
live and head tracking is working...
OK, I figured this out. Somehow my registry entries for Subnautica were
corrupted. I deleted all the invalid entries in the
HKEY_CURRENT_USER\Software\Unknown Worlds\Subnautica and both VR and 2D
modes are working now. Hope this helps someone!