Front Mission had a few air cushion and tracked chassis, I think. (That, and the T-52/-53 Enryu is an actual piece of hardware, although I'm not sure if any have left the test stage yet.)
Front mission doesn't have any tjat I can think of off hand, but I definitely align myself more with Heavy Gear when it comes to how mecha are used on the battlefield.
The issue I see with tank tread mecha is what is the benefit over a normal, less expensive and simpler tank? adding a robot torso ontop of a tank body doesn't really make it any better as far as I can see.
The issue I see with tank tread mecha is what is the benefit over a normal, less expensive and simpler tank? adding a robot torso ontop of a tank body doesn't really make it any better as far as I can see.