That was a great idea to add to this game a moving mine in form of Goliath. Goliat during WWII was not alone in fact was only the smalest one
There was also a a secound biger vehicle called
Borgward IV http://de.wikipedia.org/wiki/Borgward_IV
used by germans during Warsaw upspring
http://pl.wikipedia.org/wiki/Eksploz...li%C5%84skiego (unfortunettly no english links)
Metod of use this vehicle was different than in goliath. Operator drive them to obstacle buenker etc. and left a carried mine with mechanism without leving vehicle then inside his tankette go back to his lines and when was in safe distance remotly exploded mine. German left one of this vehicle as a trap during upspring and allow "capturing" and leater intiate explosion.
But in fact first was Russians with his Teletanks in midlle of thirtys
http://en.wikipedia.org/wiki/Teletank which metod of use was comparable to Borgward they deliver a explosives to place and retrat before explosion. They was even more advenced because was wireless remotely controlled and operator was in another tank in safe distance. They was used in early rusian campaigns like Poland , Finland and begining of Barbarossa.