Scarier darker lighting and textures, prisoners being tortured in the moment, screams of citizens and stalkers, witnessing actual gross surgical scenes of stalkers and combine soldiers, seeing stalkers move creeplily in the distance out of sight, more cold eerie sounds, like distorted radio chatter, that make it sound like a combine soldier is going insane, and basically everything else like that.
Scarier darker lighting and textures, prisoners being tortured in the moment, screams of citizens and stalkers, witnessing actual gross surgical scenes of stalkers and combine soldiers, seeing stalkers move creeplily in the distance out of sight, more cold eerie sounds, like distorted radio chatter, that make it sound like a combine soldier is going insane, and basically everything else like that.
Outlast
actual prisoners in the cells, less lighting, that's about it