Tech Romancer

Tech Romancer is a 3D beat-em-up with a difference; the difference being that, rather than controlling one of a set of martial artists, you control one of a set of huge robots (or mecha). Ranging from the absurd (A huge, spherical mech with a boat and bus for feet, a house for a head, train for one arm and office building with wrecking ball for another) to the "typical" anime styled mecha (Beam-firing chest gem, detatchable rocket-powered fists) to a more westernised idea of a mech (Huge, sluggish, equipped with heavy cannon, rockets, missiles and land-mines), you're bound to find at least one which suits you.