I had the same problem ( 30 second crash ) on both Portal 2 and Bioshock. Yesterday my wife was out for the night and I got a huge urge to play Bioshock. Since i’ve been trying everything possible to make it work with vorpx for the last few weeks , I decided to get a cracked version of the game ( feeling less guilty since I bought it on steam) And it worked , I played a few hours without any crashes. Dont know if this info can help you Ralf but I felt like sharing it.
We need 3d for Outlast now and the world will be perfect.