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A planet with no star of its own and eternal darkness.
Survival is by illuminating the territory with searchlights and the like.
But the most important thing is the wildlife that hides in the darkness. It will come out of the darkness at random (or not random) moment under scary sounds and break buildings/kill the player. Turrets and other weapons will only be able to deal damage to vermin in the consecrated part of the area. This will force the player to develop and sanctify the planet while exploring it.

kuwabaroff wrote: Sun Sep 22, 2024 12:43 pm … But the most important thing is the wildlife that hides in the darkness. It will come out of the darkness at random (or not random) moment under scary sounds and break buildings/kill the player. Turrets and other weapons will only be able to deal damage to vermin in the consecrated part of the area. This will force the player to develop and sanctify the planet while exploring it.

This part at least is covered by Will-o'-the-Wisps . Wisps appear at night and may leave rust to buildings or even attack stuff. But they can be deterred by special UV-lamps.