This game was hands down my favourite classic Xbox game (Halo:CE is a close second), this game took the little embers of a mech fan in me from Iron Soldier 3 and turned them into a flame. The raw power fantasy, even the camera angle and scope made the world feel so small and stompable, and all the weapons were so powerful, with everything except other mechs falling in a salvo or two.
I remember wading through rivers chasing down convoys of ships, swatting helicopters out the sky with missiles and machine guns, mowing down entire squads of tanks with autocannons and lasers, and all the squishy infantry that pop into little red clouds when you stomp through entire platoons of them.
This game is such a precious memory of mine, and I would love to see it reach PC through GOG.