Mech Warrior Onlineit's a closed betaor any of the mechwarrior games
Hawken. It's like Mechwarrior except the mechs feel less like 500 ton tanks on legs and more like the Japanese style of mecha, with like sprinting and dashing and stuff. Also jetting. It's in closed beta though.
sprinting chickens < hulking intimidating war machines
also transformers fall and war for cybertron are both like %100 robots, but they're transformers which may or may not be your thing.
or just like blow stuff up with robots.