There have been a few attempts to build giant robots like those in the past.
The flaws they have at this point outweigh the potential uses of such technology. They are too slow, and easily defeated at this point. Robot movement, isn't quite up to snuff to move such massive machines at any relative speed to equate to them actually being combat worthy.
I think of them less like gobots (which i recall being the cheap transformers alternative back in the day) and more like Mechwarrior (Battletech) mechs.
Smaller mechs are starting to appear on the battlefield (like the dog mech) in limited non combat uses. Then there are the bomb mechs we've had for a while, also small. Large mechs still have significant issues with any quick movement.
Boston dynamics have that human sized mech doing pretty well, but his battery life, and weight are serious concerns, not to mention his fragility.
Good points. Getting it to move is always the challenge. The tires give it an advantage there. We can make it move with technology we have now. I would make it a quad instead of a tricycle design. Remember 3 wheelers from back in the day and they'd fall over pretty easily.
Tracks are better than tires for really large heavy things. And if you put them on the bottom of a leg that could function like a leg, then he could step over obstacles that couldnt be walked over.
I was thinking bipedal locomotion... Tracks would work on the bottom of that for forward motion.
I dunno my view of giant may be different than yours. A 30' tall robot bipedal standing, could have a 6' tall track under its knee joint for locomotion. Lifting said tracked foot would be heavy and only used for situations where they could not just roll over the obstacle to allow the obstacle to assist with the knee joint lift.
A pair of decently wide tracks under knees would povide excellent footing on all sorts of terrain. make him so in most situations he sort of squats for some downward motion of the tracks with gravity (of course electrical or mechanical resistance so it isnt slamming into the ground).