I can’t remember the system, but you were a little guy with a gun running through various bases. The bad guys had diffirent models of robot vehicle you could commandeer: I remember a spider-one that coudl walk on walls and ceilings, a ball one, a heavy tank type, a flyer…possibly others. There was also a versus where two of you’d pick a vehicle and fight. If the thing got too damaged you have to run around as the little guy till you found a new one.
Vague, I know. But I suddenly remembered this game today and how much I loved it, and I wanna see if I can get it again without too much money. It was old though, kinda primitive.