Three Vertical Offensive Tank(s), One-Man (VOTOM), Kokopelli-pattern. One is a standard NCSF, stock with painted midsection. The other is one loaned to the Ice Planet Confederacy, obviously meant for ice planet operations given the special polymer skis and pressure tanks. The odd one out is a captured Blacktron Kokopelli. The Blacktron insurgents re-painted and upgraded a stock NCSF mech in their own intimidating style.
Here it is on CUUSOO, if you like it so much you want your own. http://lego.cuusoo.com/ideas/view/25165
(P.S.: I had an account here before, but my email got hacked. I'm definitely up to contribute to this fine community.)