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This guy hit is right here, ZOE, specifically ZOE2. It's not like M.U.S.H.A. where the mecha could be replaced by another unit, it had to be a mecha and it had to be something wild like an orbital frame. What a kick ass game.
Off the top of my head some of the greatest are bumpy trot, the front mission games, any of the half dozen assault suits series, the first GitS game, trone bonne, and some old system classics of which I'll only name Metal Storm.