I am loving the last one, feels epic. The other two are too murky and indistinguishable to my eye, perhaps more shadow and lighting effects would help?. I also like all the warning / danger signs with their distressed look / flickering look, which reminds of Alien in terms of both run down spaceships and electronics which are not perfect. More detail needed on the gun, looks like a blank slab of metal.
I like the character, they look cool, I want to see what they can do!
ninepixels Nice start!