I went a little off course, since I just finished the introduction course and decided to practice a few things that I learned there. I rigged the mech and added IK to the knees. I also made a very simple Camouflage material for it, using a 3 color constant color ramp, and a Musgrave Texture.
I added a simple UV sphere and deformed it a little to make a rock for the mech to stand off to give the scene a little more character.