I agree with many of the points that FIST: BLOOD SILO Made...including the suggestions...
The imagery and themes are all evocative and suggest a really creepy mission....the dark backgrounds, the color scheme, the artwork/images...all fit amazingly well together.
In addition, the imagery is supported by the vivid descriptions, the air tank mechanic, the weird and creepy monsters, and the desperation of trying to find those three filtration systems. The feeling of being trapped underwater permeates the entire module...