Ever read that one dieselpunk book "Leviathan"? Probably not. But, that's not the point. The point is, the main vehicles/army units in the books are legged machines that "walk". This is for the side that's named "Clanker", who are die-hard dieselpunk. *I don't care what you say, GoIO is DieselPunk*.
Anyways, they're exactly as they sound: Giant machines that walk. Loaded with cannons and guns, and obviously, filled with a crew. You've got pilots, gunners, engineers, all that.
I don't think these'd be a half-bad addition to the game. Obviously just lore wise, and maybe as some background appearances. Maybe even some interaction in Co-Op and Adventure Mode.
Thoughts?