I figured out what is needed to make Alien Isolation run on the Rift in 1.3. This video shows no head tracking but I have figured out how it would be possible to add that. I might come back to this after finishing the Half Life VR 1.3 mod. Adding support for this is a lot of work and I don´t have time for it, but I at least now know what would have to be done to add support for 1.3..