Very nice sculpting there! The rig on that thing is insane! I would like to move all those bones to make an animation :D. Looks great though, nice work!
really clean mesh, clean topology, nice materials, nice sculpting, and from what I can tell, nice and good anatomy.
Nice looking rig too. (no controls setup yet?) looks very cool in all.
I have one big crit though, and a smaller one. It may be an alien, but it’s proportions are human based.
The legs… the legs are the largest muscles in the human body. Whereas your alien has a very large and muscular torso, he has very thin legs, like one of those bodybuilders that only works his chest. arms and shoulders.
My smaller crit would be that the bottom of his chest, where the diaphragm is, seems a little underdefined, near the solar plexus.