>>64080929
>Technology exists to make giant walkers possible
>Take that technology and just... make a tank. But really big.
>Immune to any form of weapon guidance thanks to its ECM and truly absurd laser "defense" system from having multiple reactors that individually make a Atlas's reactor look small
>Weapons up to an infinite heat lasermonster crab's beamspam won't even scratch it
>Infinite power and ammo thanks to energy weapons and multiple fusion reactors
>Can engage targets at land, air, sea, and space, and drive along the bottom (or top) of the ocean without harm
>Faster than any military land vehicle known to man
How do you take it out?

In literally any scenario that you can make mechs, you can make tanks that do the job better.