Thanks for video! I see Unreal Engine games compiled for Windows can run under Linux (via wine) surprisingly well.
Lighting does not work correctly and looks like wine can't deal with shaders that use absolute world coordinates (this is why you cannot see much of floor or ceiling), though game is still playable, if harder as it is darker.
I suspect many hallucinations won't work properly and this is why you were confused about "white screen". At least effect when you are close to Entity seems to work correctly.