Spider tank game does sound cool. I actually have a scifi concept about cyborg-vehicles that people ride inside of. They’re genetically-engineered living tissue with cybernetic components, a cockpit and possibly a neural interface, and they would be walkers.
The walking controller is generic, so it really should accommodate any number of limbs. And you could quite easily make it lumber more slowly like a mech.
Basically Eva spider tanks? Want.
I don’t see a lot of games actually make legs look like they’re reacting to the ground under them so the concept is cool and really makes things feel … grounded. The last I remember is MechWarrior 4 from forever ago.