Ogre variants, haphazard sizes with some calculations. When it comes to soil mechanics, apparently it really helps for tanks to have malleable treads, with suspension and such, so I gave mine 6 tilt-able track modules with 4 tracks each. Even so, pressure is more than 2x that of a modern tank. Possibly an Ogre might need rockets or even nukes for glassing terrain to get out of situations.
