The free monster from 3DRT is currently used for the mutant in the game prototype. I plan to hire a freelance 3D modeler for the real model of the creature. I dream to work with Max Shelekhov from 3DRT since many years, but I have recently discover a lot of talented modelers like Maxim Lyulyukin or Sama Van. I will probably send request to multiple artist when time will come.

The creature walks on four legs and has an aquatic aspect because it can swim on the acid sea. Of course it has claws

I kinda like the actual one

Is like a cute dog =) remind me.. uh.. HL2 Mascot of the scientis... when the teleportation goes wrong, att the begging? Well.. that one.

Though I would go for more detailed models in the mean of they are more "realistic"... Clear nasty mutations, and some other horrorific stuff for them.. I believe it would fit them pretty much ok.. Though... I don't know what you want to it to feel like.. if an more Doom tendency (horror, and such) or a more Quake 2 feeling, with less horror and more sci-fi... Maybe something like.. uh.... Quake 4.. or maybe more ala Resident Evil.. or if You preffer, something more GoW'ish...

You had to clarify what you want it to feel like. Maybe make it on Spore Creature creator and then take him a pic. That would be pretty much usefull.

The last week-end, I've browsed the portfolio of the 3D modeler Eugene Fokin who seem to make some nice work for the Unity game engine.

In his "Personal Network" I have also discovered an artist called Bradley James who made this:

I don't like the bottom of the jaw, but it is globally interesting...

May I say is like the Imp versions of Doom 3?

But, looks nice... May be with a good skin... Some kind of this color with this color and this for the eyes? and maybe this green in combination with the others

lol, mutant is a 50% animal and 50% primitive man

You read my mind
I'm a big fan of the Doom3 Imp, especially the crawling one.

This creature is really near what I want for the mutant, only lacking the aquatic part. And I only want it to walk on four legs.