Warhammer 40K Lite?

[Morlock]

Originally Posted by ericthered

If you're toning them down anyways [snipped.

I will look at your recommends, thanks.

[johndallman]

Originally Posted by Morlock

I want something more "realistic," i.e., pretty much no one as a class (space marine, inquisitor, etc.) walking around feeling like a mere peasant with a bolter can't put him in the grave.

A possible way to describe this: are you looking for play in a WFRPG style: low-powered, gritty and grimy, in a W40K-inspired setting?

In any case, Horror is likely to be useful to you. It has a lot of good material on campaign design in general, and on what makes things weird and frightening in particular, plus TL8 character templates.