How the heck did that thing walk! Surely it would topple over? Either that or Gary is having us on... hehe, wouldn't surprise me. If we look back at all the robots in RW then Millennium Bug, Anarchy, Stomp would all be illegal. In technogames then Scuttle wouldn't pass, Ulysses would fail to.
The only true way it seems would be to make a machine like one of the 4 legged Mech-warriors... which would be dam expensive and difficult.
Either that or someone bites the bullet and goes for something like Mechadon... but NST would have it in bits in seconds!
I think it seems to be gravitating towards less that 100% extra for a cam walker, maybe 25% or 33%. That way most of the extra weight would be used in the walking mech and mean that you couldn't get an extra big weapon as a result.