Dynamic lighting and shadows are absolutely key to the atmosphere of AvP: as a Marine you are constantly trying to
survive in a dark environment — jumping at shadows and lighting your way forward with a flashlight and flares.
Not exact matches
There,
in the near - freezing, totally
dark, high - pressure, low - nutrient
environment, some might have adapted
in novel ways
in order to
survive.
Survive in an evolving
environment by morphing between light &
dark forms to camouflage from your predators.