Man has within him a primate instinct that desires to be more powerful and protected. The two go hand in hand. We want to play offense and defense and be the best at both. Sword and shield, bullets and vests further in time we seek this design. The MECH.
Mechanical warriors are weapon strapped metal plated armor robots worn and controlled by their human riders. Exhibiting uber strength Mechs are know for the destructive paths they leave behind. Two recent movies have illustrated Mecha warriors in full scale glory. Namely Avatar and even greater in District 9, which are pictured below (click pics to enlarge).
Right above I've taken a picture from a site chalk full of concept at robots and Mechs you'll enjoy. While still mainly science fiction on a larger scale, some have invested time and tallent into building a version of their own as you'll see in the video below.